And yes, it's on Assassination. lol.
But we've played several Phantom games now and every time a player dies, their stuff stays around. They are reported as dead, they count as an innocent or phantom death toward game victory, they cannot issue any orders -- but anything their base was doing continues to happen; factories still produce units, waypoints are followed, etc.
We usually play modded, but I can reproduce in vanilla with all mods off. Started a couple of weeks ago. Easily reproducable even with AI -- just build a few things and then ctrl-k your ACU. Your buildings will all remain. You will be able to select, but not issue any new orders.
If you want a replay, we did https://replay.faforever.com/18038205 last week. Takes 58 minutes for first death tho (dark green).
Let me know if you have any questions.