I often find it slow (the copy part) when I have version 12 open together with newer versions.
I still script in version 12 (lowest common denominator) while running newer versions at the same time and copying text in the scripts often pauses for a couple of seconds.
Having just 12 running on its own there seems to be no problem.
So it could well be a combination of programs (Archicad or not) that you have running at the same time causing the issue.
Barry.
One of the forum moderators.
Versions 6.5 to 26
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