[OPEN] Roof clipping through walls

Hi all, not sure if this is the same issue as OP, but it seems a few other threads with roof clipping issues similar to mine have been merged with this one. I'm specifically having issues with the round/penta/hexa/octagonal roofs used with foundations. Without a foundation, all roofs act as expected and don't clip into the adjacent room (see "No Foundation" image). Once you add a foundation, these rounder roofs clip into the room (see "Max Foundation" image). Even raising the foundation a small amount causes issues. For example, the problem becomes visible for medium height walls after raising the foundation only two levels (see "Foundation Level 2" image). You can raise the foundation a bit higher with tall walls without issue, but ultimately, all wall heights are affected. Makes it pretty difficult to build a castle with octagonal spires on a cliff aha

The same issue is happening for my sister. We're both on Mac, running version 1.68.156.1220, no mods or cc. I noticed this issue yesterday, she noticed it two months ago, but it seems someone else had this issue back in December 2019 (bug report on 8 point roof clipping), so not sure if I can tie it back to any packs or patches. I've tried repairing my game, but it didn't fix the issue.