Gable Roof Intersects with Placed Walls and Items

Steps to Reproduce

1. Place gable roof on basement floor to make a-frame house on ground level
2. Gable roof is 2 storeys high from ground level
3. Roof is 10x20 measurement
4. Place wall inside
5. Place or move window, door, or floor nearby the problem wall
6. It will now clip through the roof. Adding a wall next to it is fine. Just this one wall. Other walls are unaffected.

Explanation

issue with hollow gable roof. for some reason, whenever i place a new wall item (window, door, etc) nearby one of my walls in my roof, it switches to a normal wall and clips through. the only way to fix this is by rejoining the game, deleting the wall and replacing it. but it happens every time i place an item nearby. leaving and re-entering build mode doesn't fix, only rejoining the game. i'm on laptop and in a public server. happens on multiple different land plots.

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