@maudlin27 You can try this replay: https://replay.faforever.com/21595213
We updated Wyvern to v5, which is uploaded here: https://forum.faforever.com/topic/362/wyvern-battle-pack-v5-for-all-game-versions
At 18 minutes the Cybran AI tries building an experimental surrounded by shields between the 2 AI bases. But it's alternating between experimental types. For this match the Wyvern T4 shield was disabled, but it was alternating between village & city shields which also have a size difference.