Ring of Blasting setpiece covers Cave staircase entrance

Random Seed: -173005989

This tile is supposed to have a staircase/Cave entrance and the map says so, but it is completely covered by the Ring of Blasting setpiece and is essentially invisible until the player randomly walks on it. (On a more minor note, the metal structure north of the box of coal appears to have a z-axis/z-indexing mistake - when the player’s sprite overlaps it, they should appear on top of it, not underneath it.)

Originally discovered by Kailaria about an hour into a 100% run, where the bug made it look like the run had just become impossible:
https://www.twitch.tv/videos/729136290?t=01h00m34s (Twitch VOD - expires in 56 days)
https://www.twitch.tv/kailaria/clip/VivaciousCulturedJayHotPokket (partial clip)