and of course, now i try it again and it works normally
it wasn't a part of the group or a suspended group, tried it multiple times
with new walls and it didn't work.
since i needed it for a slatned curved wall, eventually i gave up and used the terrain tool. when archicad realized i don't need it anymore, it started working...
thanks for the help anyways, will try to see if i can recreate the "bug"...
Archicad 21/22/23, Windows 10 64bit,
Asus GL703VM, Intel i7 7700HQ, GTX 1060, 16GB