Crouch Error

When in 1st person, sometimes my crouch button doesn't physically lower me / alter my vision of my screen (I do not crouch!). When in 3rd person however, I still see the crouching animation. This only happens sometimes, and it makes it slightly difficult to tell if I am indeed crouching/hidden or not (I can tell because of the eye/hidden icon - but I would ideally like to be able to see myself lowering / hiding, Instead, with the bug, she just tilts her tools ever so slightly. She doesn't fully tilt them and lower to her knees like she should / doesn't crouch / lower).