Running/sprinting glitch - character randomily stops or just walks.

Can someone help me with a sprinting/running bug? Everytime i run for a while my character stops in place or just walks instead of running. It happens everytime i play the game. I've tried closing any other app but it didn't help. It ruins whole gaming experience... Auto-run do not help at all, same with reinstalling and repairing the game, I just don't know what to do.

Steam
PC