I failed to reproduce MaximusXXX's error and the game now desyncs for me, too. Probably because of the Mantis fix.
However, while testing just now, I found new problems:
Game: #15195914
Timestamp: 20:00
Issue: UEF T1 Attack Bomber seems to do very little damage
Game: #15195914
Timestamp: 28:00
Issue: Cybran T2 Naval Support Factory auto-repairs VERY quickly
Log isn't much help, as I didn't have debug enabled. 
Game: #15195914
Timestamp: 20:00
Issue: UEF T1 Attack Bomber seems to do very little damage
This is a known issue, it has to do with a change unrelated to performance. The Janus is hit hard too by that same change. Keyser is going to look at it this weekend.
Game: #15195914
Timestamp: 28:00
Issue: Cybran T2 Naval Support Factory auto-repairs VERY quickly
I'll look at it - thanks for reporting it.
A work of art is never finished, merely abandoned
Hello Jip, thank you very much for your work in the forum and the game. Thanks also to the team. I think it's great how the community helps with every question. That's what I wish for in every game.
Regarding the question, I have noticed a drop in performance in the game so far (1 - 2 players vs 4 AIs)
There is an issue with the current faf develop that was introduced yesterday. It causes a lot of warnings. It is fixed in about an hour 
.
A work of art is never finished, merely abandoned
Hallo zusammen, ich hatte zwei Patien hintereinander diesen Fehler,
...
EXCEPTION_ACCESS_VIOLATION (0xc0000005) at address 0x0050dfd8
attempted to read memory at 0x0000005c
Program : C:\ProgramData\FAForever\bin\ForgedAlliance.exe
Cmd line arguments : /init init.lua /nobugreport /log C:\ProgramData\FAForever\logs\game_15248616.log /gpgnet 127.0.0.1:51021 /mean 1366.81 /deviation 289.003 /savereplay gpgnet://127.0.0.1:60541/15248616/Saver.SCFAreplay /country DE /numgames 8
Callstack:
Unknown symbol (address 0x0050dfd8)
Unknown symbol (address 0x0068af40)
Unknown symbol (address 0x2046e5fb)
Last 100 lines of log...
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
debug: Current gametime: 01:32:30
debug: Current gametime: 01:33:00
debug: Current gametime: 01:33:30
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
info: CWldSession::DoBeat() unknown entity id (0x2ff0274b) supplied in a pose update.
debug: Current gametime: 01:34:00
warning: Scanning: unit ["xsl0307"] has no MaxWeaponRange - "RNGAI Response BaseRestrictedArea"
warning: Scanning: unit ["xsl0307"] has no MaxWeaponRange - "RNGAI Response BaseRestrictedArea"
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
debug: Current gametime: 01:34:30
warning: Scanning: unit ["xsl0307"] has no MaxWeaponRange - "RNGAI Trueplatoon Large"
warning: Scanning: unit ["xsl0307"] has no MaxWeaponRange - "RNGAI Trueplatoon Large"
info: CWldSession::DoBeat() unknown entity id (0x2ff029fa) supplied in a pose update.
warning: Scanning: unit ["xsl0304"] has no MaxWeaponRange - "RNGAI Trueplatoon Large"
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
debug: Current gametime: 01:35:00
warning: Scanning: unit ["xsl0307"] has no MaxWeaponRange - "RNGAI Trueplatoon Large"
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
warning: GetResource: Invalid name ""
info: UI_MakeSelectionSet 1
debug: Current gametime: 01:35:30
debug: Current gametime: 01:36:00
info: CWldSession::DoBeat() unknown entity id (0x2ff02abc) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02abd) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02abe) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02ac1) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02ac5) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02ac7) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02ac8) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02a90) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02ace) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02acf) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02ad0) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02ad2) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02ad3) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02ad4) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02ada) supplied in a pose update.
debug: Loading module '\000/projectiles/aifquantumwarhead02/aifquantumwarhead02_script.lua\000'
info: Hooked /projectiles/aifquantumwarhead02/aifquantumwarhead02_script.lua with /mods/rks_explosions/hook/projectiles/aifquantumwarhead02/aifquantumwarhead02_script.lua
warning: ACU kill detected. Rating for ranked games is now enforced.
debug: Loading module '\000/effects/quantumwarhead/quantumwarheadeffect01_script.lua\000'
info: Sending game result: 8 score 1
info: GAMERESULT : \000score 1
info: Sending game result: 3 defeat -10
info: GAMERESULT : \000defeat -10
debug: Loading module '\000/projectiles/adfgraviton01/adfgraviton01_script.lua\000'
warning: Error running lua script: ...ogramdata\faforever\gamedata\lua.nx5\lua\platoon.lua(4005): attempt to call method `GetLocationCoords' (a nil value)
stack traceback:
...ogramdata\faforever\gamedata\lua.nx5\lua\platoon.lua(4005): in function <...ogramdata\faforever\gamedata\lua.nx5\lua\platoon.lua:3995>
info: CWldSession::DoBeat() unknown entity id (0x2ff02abc) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02abd) supplied in a pose update.
info: UI_Lua import("/lua/ui/game/confirmunitdestroy.lua").ConfirmUnitDestruction(false)
debug: Current gametime: 01:36:30
info: CWldSession::DoBeat() unknown entity id (0x2ff02b78) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02b7b) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02b7c) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02b7d) supplied in a pose update.
info: CWldSession::DoBeat() unknown entity id (0x2ff02b7f) supplied in a pose update.
Das Spiel lief so lange gut, bis ich die Units von der besiegten ACU übergeben bekommen habe.
Spieleinstellung:
Team 1
1 xPlayer 3x Sorian AI VS 2 x RNGAI 2 x Sorian AI
Mods:
RKS Explosion
Graphicenhancement mod v1.1
RNGAI
Saver Fatboy2
Ich hoffe der Bericht hilft evtl. für den Patch.
Und nochmals vielen Dank für eure Arbeit an dem Game.
Thank you for sharing it, this is a known issue and is being solved .
edit: it is the same issue described here:
And the source is found.
A work of art is never finished, merely abandoned
@Jip In https://replay.faforever.com/15287785 , somebody said that the explosions from UEF T2 Destroyer shots looked like the ones from a battleship. Might apply to UEF T2 PD, too.
Yes - that is part of the change by @keyser if I am correct. It is intended, to give the unit more 'wow'.
A work of art is never finished, merely abandoned
I'll look into that too tonight .
On another note: a milestone! The benchmark map that we'll use is made by Marlo and has recently been finished! You can find the trailer here: https://www.youtube.com/watch?v=6-F_-HXgO_M
The trailer was made on the regular branch. As you can see the game starts to stutter more and more as it continuous. Our job is done when we can record this trailer with no stutters at all.
A work of art is never finished, merely abandoned
Upcoming Sunday (yes - it got moved slightly) the new patch will be live! This means that we're merging the develop branch with the standard branch that everyone plays by default, including ladder.
Soon after new PRs will merge into the develop branch with more optimizations and features. You can read up about some of them in this post or by checking the pull requests on Github. Please keep playing the develop branch as it provides us with important feedback on whether the changes help and are appreciated in general. It is a solid approach to contributing to FAF while literally just playing the game and reporting back.
As an example, with thanks to @WhenDayBreaks and @snagglefox some critical errors were found and fixed, including a few that were present in the standard branch too. The ping-preventing code got re-implemented and is now the same as you had before, but without the ability to abuse it in the name of someone else as easily. I can keep going with examples - know that your feedback is appreciated and I hope you all keep them coming in the future.
A work of art is never finished, merely abandoned
And with the patch live we continue: debris is now significantly cheaper on the sim and available on FAF develop. Up to the degree that they have essentially no impact on it anymore! This should speed up the game during battles as that is when a lot of debris is made in general. See also this pull request for more information.
Overall - please keep playing FAF Develop as you have done previously. The input you provide is appreciated and is important to us and for us to make sure everything is stable.
A work of art is never finished, merely abandoned
@jip Today #15350662 enemy GC dies leaves no reclaim
#15351245 game hard crashed for me, not even control alt delete or alt f4 worked
