My character gets stopped by an invisible wall in my map (even with the collision shape as a circle)

I am making an aerial view game (so there’s no gravity) but my character gets blocked by an invisible wall in my map. I can walk everywhere else and I’ve figured out where the obstruction is by walking all around it; there’s just some blocks my character can’t cross. In edit mode I’ve hovered over all the squares in the area and there’s no objects there. I’ve tried changing my character’s collision shape to every option and get the same result every time. All my arrow key movement commands are set to ‘repeating.’ When I first started it, it seemed to work just fine and it could walk everywhere as far as I could tell. I don’t know what I did wrong.

Could you leave a link to the game?

Normally when that happens I reload the page it I’m fine. Try copying the game maybe?