This is a mystery problem that I do not know what causes it.
That is the properties panel becomes some other panel. It will stay that way until i undock it and move it around which causes it to become the properties panel again. Then, when I dock it again, it goes back being some other panel.
Here, the panel in the lower right WAS the properties panel.
Now I have undocked and it says its the properties panel but still isn’t.
I restarted Rhino and it stayed the same way. Closed rhino and that panel remained on the screen. Closed that and restarted again.
Now Rhino thinks the properties panel is being displayed but it isn’t on the screen.
I turn OFF the properties panel and suddenly it reappears.