I don't know exactly how it's caused either by walking normally with shift. But I get stuck in a permanent walking mode. I can still run when double tapping "w" but shift doesn't return you to the normal jog mode. You have to log out and log back in to fix it.
- Legacy ID
Either by shift to walk or by entering ads while walking I haven't figured it out exactly.
I can confirm that this occurs. Double tapping shift does not fix the issue. I have heard on Reddit that pressing the right mouse button can fix the issue, but that isn't really the point. I think the game thinks you are aiming a weapon (so you can't run), but without any weapon in your hands.
have you tried double tapping the shift key?
from my experience double tapping shift seems to toggle walk sometimes,
I have found this happens to me where its not toggle usually after sprinting and walking up stairs into a house so it could also be a fatigue thing....