The edges of doors and windows do not show the correct materials to suit your complex profiles.
As you have discovered you will see only one material - I'm not sure exactly which material it chooses to show.
You really don't have any control of it anyway.
You can over-ride the wall end material but this will still only give you the one material.
Here is another post on the same subject.
http://archicad-talk.graphisoft.com/viewtopic.php?t=45062
Look for the post by Karl that offers some links o other solutions.
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