Standing at a corner under steam, but far away enough to not be impacted by it, causes the player animation to reset for a tic

If the player balances on the edge to show the balancing animation, every time there's a steam below that is far away to not push the player away, the player's animation will reset for a tic and then immediately go back to the balancing animation.

This can happen normally on THZ1 in the background of the GIF there where's there's normally steam, but I reproduced it with a debug addon to make the correlation more clear and also because I erased everything off the map so I wouldn't need to bother with enemies and such (the addon is capable of that).