Check out this dude, recording from current version a few minutes ago:
This has happened for me a couple of times in the recent patch, in all cases the trigger seems to be new enemies entering from off screen while already in an attack animation such as a charge. The initial animation doesn’t play out correctly and is unlinked from the hitboxes, presumably because the start of the animation happened off-screen. After the first attack animation they work normally again.
This is probably related to the performance tweak which stopped the game from retaining the positional data for enemies which aren’t on screen, whatever it was which caused all the T-poses recently.