After a few minutes of playing, possibly from the camera shifting while climbing, my camera gets stuck in the middle of crouching and standing, and it refuses to shift properly to either. My weapon shifts like I'm crouching when I press the key, but my camera doesn't actually move down. It's like it can't make it to the proper standing or crouching camera spot and just gives up.
Fixed it by quitting to main menu and starting the game again from there.
Playing in first person i think i had the same issue today - i didn't feel that my view was stuck between normally standing and crouching (it could have been but if it was i didn't notice) - what i did notice was when i pressed the crouch button my weapon position would change and my screen would lower, but only by a very small amount.
To me it felt like i was trying to crouch but hitting an obstacle.
i changed to 3rd person view and the player figure does crouch and stand as normal, but on changing back to 1st person the issue was still there.
I was playing in offline mode, in the forest Gauntlet realm with the Forge minor realm card played.