Try unplugging keyboard and use a different one or just plug original back in.
Somehow worked for me after all those fix's
Does that mean the crouch problem is fixed for you only with unplugging the keyboard? Or am I misunderstanding here something :'D
Correct - for me the issue was fixed once I unplugged my keyboard and tried a different one. It continued to work when I then plugged in my old keyboard. So somehow it was a keyboard config issue and unplugging the keyboard cleared it.
I did replicate the issue and it has something to do with trying to bind the crouch/slide option to a mouse key. I cant explain why but it happened again however this time i just reset key binds and he stood right back up again.
