He started pressing the undo button for no reason at all, but that made the game crash. The crash only seems to be on my side, not on his.
This crash does not appear when playing on a single player map.
Excuse me for any mistakes I make, this is my first time on this forum.
The button in question (for clarification):

Steps to reproduce:
- Play multiplayer and be the host
- Unlock construction bots
- Press the undo button multiple times
- Crash