I’ve noticed a strange bug relating to changing the viewing angle and offset of movement. When you re-enter first person after changing the third person viewing angle by holding right click, your movement keys will change to match the perspective which you have re-entered from. This does not occur when re-entering first person if right click is NOT held.
The attached video will do a much better job at explaining this than I will. Take note of the keystroke overlay at the bottom of the screen. My movement keys are bound regularly to WASD.