Here's the recent errored loop, the normal fast run loop becomes "hit" animation after recent winter update Ia believe. 

Recorded the errored animation here, at first I thought it was associated with new marnis outfits, but after switching outfits I realized it's just tied to the character:

Hoping for fixes.

Yeah they've added it to their list of known bugs but its been over 3 weeks. I don't understand why its taking them so long to patch a broken running animation.

Looks like its fixed after this update (3.27)

I can confirm, my arher runs like a cripple too.
its amazing how no one at PA ever noticed it. Do they even play their own game?

It's fixed.  At least for me.