I have never seen this bug before, and it seems like nobody has made a topic similar to this.
The character is 2x2 stud square, it has a Torso and Head only aswell as the humanoid for it to move. But there’s just only one issue.
If you try jumping, and the space above the character is the same as its Y size, and theres a block above it, for some reason it just hits the empty area, unable to jump.
The character in workspace:
