Roof tile glitch

[edawgsnizzle]

Not sure if this is tileset specific but on tileset FALL TOWN, the end piece for the pitched tiled roof glitches like this when the area below is discovered via room number.

[kitty624]

UB-vanilla, UB-1.13 or JA2 or a JA2-mod?
(it matters since different tilesets will be used, for UB the ones in UB, for JA2 the ones in that, for mod the ones in mod)
Standard size or an experiment with bigmaps?
(need to know for trying to reproduce)

[edawgsnizzle]

UB1.13 is all ive tried so far with all size maps