What are the "Floor Plan Display" settings for your wall and windows?
The easiest method is to have these set to "Symbolic" for both.
If you want to start using the floor plan cutting plane then you will want them set as "Projected with overhead".
Do you have more than one wall stacked on top of each other? - a window will only cut one of the walls and the others will appear to pass through the window in plan.
Barry.
One of the forum moderators.
Versions 6.5 to 27
i7-10700 @ 2.9Ghz, 32GB ram, GeForce RTX 2060 (6GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11