When using Immobilize(), the whole point is that the player can't move anymore, e.g. so that users can type text on the keyboard without accidently moving when hitting WASD etc.
Currently, only WASD is blocked correctly, but a lot of other movements are not blocked. Those are jumping, crouching, laying down. Please add those to the blocked movements so that players are not annoyed by accidental movement when they type text into an input field.