What are your machines specs and operating system?
What is on the worksheet?
I have found in the past when working with modules, that it is faster when the modules have been saved in the same version. Otherwise Archicad has to play around with library migration in the background.
Maybe something similar is happening here depending on the content of your worksheet.
Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11