A few months back I had a kubel shot twice by a zis in the early game and it survived with a destroyed engine crit.
I was shocked as there should of been no way for this to happen due to 320 damage vs the kubels what 200ish hp ? and it reminded me of coh1 where tanks could take 3 or more penning hits at 5% health which was known as the 5% bug.
This was either extremely frustrating or a get out of jail free card depending on which side you were on in the exchange & it seems to have returned in coh2 albeit in much rarer circumstances.
Today I watched a tightrope where a m3 halftrack takes a pak shot that should of done overkill damage to its less than half hp, it gets the same heavy engine crit and he is able to select the unit, all its normal ui is still there & he even dismounts his troops & the m3 remains under his control for a further 9 seconds until a second shot finishes it off.
In the comments below he mentions that it was getting the abandoned crit but just took a while to do it yet the halftrack icon is still present in the upper right hand corner of the screen donating it still being alive unlike what is seen in the clip below & in my personal experience ive never seen a abandonded crit vehicle remain active for any length of time let alone controllable and firing!
https://youtu.be/0-sr9z0CwHw?t=920
This video shows as soon as a vehicle is abandoned it disappears from the upper right corner
https://youtu.be/PGuAb4v-3vk?t=404
(5% coh1 bug is back baby!)