cant uncrouch

so i was mining in a cave and then a zombie comes, so i do what any reasonable person would do and crouched so i could use my shield. i also ate at the same time. i was holding melons out aswell so i ate some to regenerate and after killing the zombie i couldnt uncrouch. later on i was crouch-walking and jumped up a block and automatically uncrouched. so i cant uncrouch without jumping after eating food