OK, I checked earlier versions.
It crashes on v6.5.1.
We have fixed it in v6.6... by always transforming all zombie-like units to their spawned units before recovery.
And as I mentioned in v6.7 there will be yet another fix for it (just to make sure!), the battle will NOT end at all if zombie-like creatures with 'capturable: false' are mind-controlled... you will need to kill them.