I'm in Staircases and I found a pair of stairs that soft-lock me.

If I got up the one, it pushes me out on the left side of the stair in a single-tile space in which my only move is to walk back down the stairs.

And that stair places me in a similar spot. Only one tile where I can move back onto the stairs.

You can push most enemies by using them with Enter.

That area is also full of corner scooches to let you slip past without taking damage.