1.20.1 Forge.

While using epic fight mod, the player head is invisible unless you hold the sprint (ctrl) button. When I hold ctrl to sprint the players head suddenly becomes visible

I have the same Issue but with better combat and animation overhaul

same issue, though for some reason aswell my character wont turn around unless i hold control. The console spams invalid entity rotation: NaN, discarding

same issue without epic fight I think its just this mod itself causing the issue

I can't reproduce this.

same issue, though for some reason aswell my character wont turn around unless i hold control. The console spams invalid entity rotation: NaN, discarding

But this is helpful.
Appears to generate NaN when calculating the player's rotation, causing the player's head not to show.

Disable config option Rotate to interest point might solve this

I successfully reproduced this when Shoulder Surfing installed.