I’ve noticed on the PTR that disengaging will sometimes cause my character to continue autorunning roughly at the angle that I disengage at, even if my character/camera is no longer facing that direction.
I’m only able to reproduce this maybe 10% of the time. I usually managed to reproduce it when disengaging at a slight angle from the direction that my character was running previous to jump/disengaging (the ol’ disengage flick).
Here’s a video of when I managed to repro it:
At no point during the video did I press my movement keys. At around 00:20 I started toggling on/off auto-run a few times; my character slightly changed angle, but still kept running.