Every time I double tap/press a button on minecraft it just bugs out, to fix it I need to press/doubble tap. Please help!

Hello! Thank you for your attention, the issue that I have is: Every time I try to walk/fly it bugs out, for example, I try to fly somewhere but i press A for to long, the button toggles it and I let it go, but it keeps going to the LEFT(A button). Same thing with SPACE, AWSD and crouch. I've tried to reinstall minecraft, i've deleted all my files, everything.. nothing fixed it. Please help me! I'm so annoyed! Ty! <3