I will need you to upload 4 screenshots of the Curtain Wall Settings Dialog so we can try to locate the setting that possibly causes the issue:
1. Curtain Wall System settings, especially the Floor Plan and Section panel settings.
2. Scheme Settings
3. Main Panel settings
4. Distinct Panel settings
The forum allows 3 images per post so you will have to make 2 posts for the 4 screenshots.
Loving Archicad since 1995 - Find Archicad Tips at x.com/laszlonagy
AMD Ryzen9 5900X CPU, 64 GB RAM 3600 MHz, Nvidia GTX 1060 6GB, 500 GB NVMe SSD
2x28" (2560x1440), Windows 10 PRO ENG, Ac20-Ac27