Put an X on the tile in the tileset in the database. If that doesn't work you either set the player to through ON (via a move route), or accidentally set the first tile in B on that tileset to anything but star.
I've been working on status effects since last thursday, and today I finished the core mechanic of Zombie, Teleport, Curse and Recall. Zombie and Curse are lacking a few things to make them complete atm. Teleport though is the "HAHA" spell for some of my mobs, but can "NOPE" at them with Recall.