I couldnt find any issues that solved my problem so Im posting here. I cant remember when this started but everytime I walk or sprint it glitches and either makes me start sprinting or stop and i cant actually walk or sprint properly anymore. I have tried using optifine, all minecraft versions 1.12.2, 1.13, 1.14.4, 1.15.1 etc and I still have the same issue and It wont go away, its on singleplayer and multiplayer. I have attached a video showing the issue, Im just holding down the 'w' key in the video.