I am on the latest release 1183 NZE full.
And now that you mention it the slowness would have started around the time I downloaded the latest release.
The long pause in the detail window has been with V11 the whole time. What I do to get round this is select the detail in the tool selection and change the boundary box to the one with the X in it. This in turn puts a dashed circle around the detail label in navigator instead of a dashed square. Shouldnt have to do this though.
I have found V10 to be a lot slower to navigate around than was V9
Richard Wilden Design. Ltd
Dunedin, New Zealand.
Imac 27" i9 3.6GHz; 32GB Ram Mac OS 11.3
Archicad V23:V24