Confirmed
I'm sure everyone at ZOS has plenty of reports coming in. Just figured I'd throw in that this is happening regardless of what resources are owned by what alliance at the time.

I also believe this bug is related: rams are often bugging out and refusing to turn & hit doors

Specific examples that appear to be reliable test points from this weekend are (in Vivec) at different times and attempts:
BRK - front door took no damage from ram, ballistae, or trebs. Ranged attacks going straight through.
BRK - Inner front door and both posterns: no siege able to do any damage
Sej - Front door ram bugged out and ranged siege went through the door
Sej - Front door took damage but was repairing ... itself? Not sure if players were inside and able to repair during siege as we weren't about to stick around and waste the time with that crap.

Odd but possibly related: at Arrius this morning, we watched as walls switched between ~200k, full health and 300-something k and 65% health. Repairing was possible while it was showing the 300k number but they were immediately worthless when the wall flipped back to full @200k - it would flip right back to the original 300k & 65% number.


There are so many other examples but these are the best I can do right now. Will try to gather data later.