I am using these two script calls to place the default tileset archway door (B layer) on tile 5,5 and change the tile's region ID to 100:

Ritter.MapTransform.changeTile(5, 5, 3, 70, true);

Ritter.MapTransform.changeRegionId(5, 5, 100, true);

It works fine at first, but when I leave the map and come back the region ID seems to have reverted and the tile layer under the B layer archway door changed to ID 0, so it looks like a  black square door (because the A layer underneath got deleted).

For the second picture:

Ritter.MapTransform.getTileId(5, 5, 0) returns 0 for the bottom layer

 Ritter.MapTransform.getTileId(5, 5, 3) returns 70 (the arch door tile) for layer 3

Hello, I'll take a look into this as soon as I can. Thank you for reporting this.

Hi, I just noticed this fix works if the door is placed on a tile that was on the map to begin with, but if the tile was changed from its original data then the door is placed on it, the door disappears when exiting and entering the map.