Have you checked your opening reference lines in the Complex Profile settings dialog? These are the red lines shown in the attached image. In this case I have a partition with wood trim added the profile. The opening reference lines had to be moved back to the gypsum board edges to have my openings in the correct place.
ArchiCAD 26; Windows 11; Intel i7-10700KF; 64GB RAM, GeForce GTX 3060