Instant Architecture door extension (cut Fill issue)


I have an issue I’m having trouble with resolving when using the vali architecture instant door extension. For some reason scetchup is applying section fill to everything when there is no gap in the wall. But if I add a random whole in the wall the section fill is applied correctly, only filling doors and wall.

does anyone know why it behaves this way?
Any help would be much appreciated!

Sketchup fil.skp (1.1 MB)