DisplayThreadLimit didn't change anything. However, I used Moi3D's internal mechanism which spawned Wine's version of Notepad. It might be good idea to check still that the .ini file is written in right directory. Wine can't always guess where Windows would like to save things. What would be correct (Windows) directory for the .ini? I can edit it manually, if necessary (with DOS/Windows format, of course).

Also, I tried with several ways in several viewports -- no change.

I will investigate a bit more later, now I got to go.