Many players including myself have had a bug occur where you cannot get out of 'walking' mode even when holding sprint button. It occurs when walking through a bush - it seems that the client or server does not recognize when you are out of the bush again, possibly due to leaving bush at point of desync.

Video of the bug and how I fixed it - by going back in & out of the bush to force the client/server to recognize I am no longer in the 'in-bush' state.

Apologies video is quite dark but you can still make out what is going on, and if you're having difficulty seeing I can up the brightness or you can with video software.

How to reproduce? Quite difficult - it happens sporadically but I see multiple people asking about it per day.