Nethack move past seemingly unpassable area

This is my first time playing Nethack so I'm fairly certain I must be missing something simple however, I can not figure out what. I am stuck on finding my way to the next room I have tried going in every direction against the pathways to progress and tried opening doors in every direction yet I can't get out of this area.

Here is gif of the room

As you can see monsters are still entering the area I've explored so there must be an exit somewhere. I thought maybe this was an issue where the room was diagonal of the walk way but even walking diagonally I can't pass anything.

How can I get out of this room??