They remained there for the rest of the battle, doing nothing.
Captain, Engineering Corps
I've also had some bugs with boarding troops. Not being able to board grounded ships, causing me to lose the battle...
ya I have noticed that if the units don't have grappling hooks they tend to not work when boarding... even the mech spiders do this!
Agh, I can see what's wrong. They're trying to go in a straight line towards the hatch, but the straight line would involve detaching from the ship, so they are stuck. I think.
maybe add something that they try to get in by another way?