I found a bug when using the British Chevy recon unit in a MP game on Hylan Valley with the undo option selected.
When this recon unit moves into the fog and runs into a unit, it crashes the game. This happened both when it was ambushed (by an Elefant) and when it ran into a Sdkfz 7, which couldn't ambush my unit but did stop it.
This problem doesn't seem to have to do with any particular unit and map, but rather to do with ambush encounters and online multiplayer games. We're investigating. What happens if you don't get ambushed with the Chevy Recon, but another unit runs into an ambush?
I just want to amend my post, saying it was with the "undo" option deselected. So there's no undo in my game. I've been very cautious now and not getting ambushed, but I can try a few examples where I intentionally try to ambush myself and see what happens.
I tested a few examples in SP, this problem doesn't seem to exist there.
I played some more now, and this problem only seems to occur if the "undo" option is unchecked. Ambushes work fine if you leave the box checked. This makes unchecking undo option useless atm, since any of those games are unplayable.