Im not sure if this is a pyspades error or not, but i figured i'd post it here first. It seems intermittent.
Player models get stuck waist-high in the ground, but players are still able to move about as usual. Other players appear to be glitching about rather than smoothly walking (not rubberbanding, just glitching around. i dont know how else to describe it). The most annoying part of this is that you cant see someone who is crouched behind a 1 block wall, but they can still see over it and shoot like usual. Attached is a screenshot of the glitch.
Edit: It also makes players completely invisible while crouching in water.