Important problem in PBEM. Some pieces disappear

Playing civilization PBEM

In 65 log a player construct “cuarteles” (barracks). In 66 barracks have disappear, but the 66 file seems correctly load because the last situation of 65 and the start situation of 66 match, except the barracks.

Module is:


Solved. The pieces are under the tile. The tile has the property “no stacked normally”. And when saved the tile goes on the piece automatically. I have see this strange behavior when saving files when pieces with “no stacked normally” property