Hello! The Iron Will Mark doesn't react properly to the player character's legs and feet when running or sprinting. The legs clip through the mark itself and do not cause it to react as a result of it making contact. It appears that the physics of the body work alright (shifting of the hips), and other movements, like falling or jumping, also don't have an issue with the physics. This does not happen on the Binary Phoenix Mark, and that is also shown in the video. This footage was captured on PC. Hopefully this helps! EDIT: I will try to capture the issue again, this time with better lighting.