Another annoyance. Rhino will not keep workspace layout even when "Locked."

Sometimes when I minimize or switch between applications, Rhino loses my tool bar layout. Not every time, but often enough to be really annoying. Doesn’t matter if I have tool bars locked. I updated my GTX 1060 drivers two weeks ago and that solved an other complaint.
My usual layout:

What it randomly reverts to:

Yes, it does that every now and then. Suddenly panels are side by side.
To recover the layout, you can open this folder (when the layout is ok):
and make copies of

Every time the layout gets messed up, close Rhino, and replace those files with the copies.