Standing around the stairs located in The Armoury makes the character loop their walking animation instead of standing still. I have captured a video of the issue here: https://imgur.com/a/duxqXn1
The issue appears to be local to the stairs in The Armoury and I couldn’t reproduce it on other stairs in other areas so far.
On a related side note, coincidentally I also saw someone mentioning in the global chat that some of their loot got stuck in the stairs of The Armoury, so there might be more to the issue in general, but I cannot confirm this myself.