Watchtower roof is considered indoors (0.97.6)

[Sculpur]

Hello,

This is more of a design flaw than a bug I guess, but the roofs of watchtowers are considered part of the watchtower's interior. Noticed that when I decided to build a small wind generator on one of mine and it always claimed there is no wind; then tested it further by inspecting how an interior element - a bed - would behave. For the same reason, everything built on it hilariously disappears when nobody is in the tower. See screenshots below.

[someone]

Roofs are a special case of interior, for some reason the things you are building there are not being tagged as on the roof.
Try the ctrl-shift-F11 shortcut, this recalculates the on-a-roof state of all buildings. You will need to save then load afterwards.
If that doesn't fix it, upload your save.

[Sculpur]

Ctrl+Shift+F11 did not do the trick. The save file archive is too big for the forum so here is a google drive link to it:
https://drive.google.com/file/d/1ZbBZRi ... sp=sharing