Can't toggle Empire faction props in Map Editor
I can't toggle props (torture chambers, crypts etc) of rooms belonging to the Empire faction. When I switch the faction to Underlord 1 it works fine, and the props retain their mode when I return the rooms to the Empire faction.
OS: Windows 10 (64-bit)
RAM: 6 GB
CPU: Intel Core i7-3537U (2 GHz)
GPU: Intel HD Graphics 4000 (1792 MB)