It seems that to coincide with the relase of the Ecodesiner * beta that the latest hotfix for 16 has been relaesed.
No official mention of it yet which is why I have posted this.
It seems to have fixed the selection/edit polygon problem and also the slab and wall composite problem at the edges of a limited height sections not showing previously.
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