Tabs Flyouts tend to freeze if Rhino Render Window on Screen. Frozen RR Window exacerbates this

Rhino Rhino for Windows
1

In fact, I have a Rhino Render Window Frozen on Screen as well at the moment, which is a first.

So right now, tabs flyouts can’t be unfrozen.

Cascade Windows will do so for all windows except the frozen RR one.

The only way out was to save, quit, and restart. Lost the render in the frozen
Render window.

The Frozen flyouts tend to happen immediately after a Rhino Render, or adjusting anything in the RR window.

I can’t tell what causes the RR window to freeze, but it has a couple of times since today’s update. It hasn’t frozen before. I suppose it’s a render crash, but the same render load worked fine after a restart.