Gimp not return to multiple windows after using single window mode

[Pat625]

I have had Gimp 2.8.22 for some time now without major problems but lately I notice the two tool docks hang up for about 15-30 seconds after closing the large image window.  I tried the single window mode and now I cannot get back to the multi window mode.  I have the image window, and the two tool docks are together as one.  I have not been able to break them apart.

I wonder if this has something to do with the large windows updates that I get every once in awhile.  I had one not long before this trouble with Gimp.  I use Windows 10.

Has anyone had trouble or know what to do about it?