If it’s feeding it should be fine, when they wave their arms out like that they’re feeding. Due to their ability to rip themselves apart when necessary, I can’t personally see them getting stuck anywhere.
When disturbed they try to hide and will cling to whatever they’re hiding in.
I wouldn’t be worried, may be able to entice it with a chunk of food held away from the plug, let it touch it with the arms and don’t let go, sometimes they climb out on top of the food to eat it and thus can be moved.