The Return Of Gengar
Issue #1815
new
This isn't anything serious, but might be confusing for people whom don't understand that it is a bug, but yeah... after you leave the area and go upstairs and get the Cultist DNA (might be just after you go upstairs), the Gengar returns after having left.
Furthermore, you can walk through Gengar, stand on the same tile, and so forth. However, you cannot interact with it.