When one of the docker minimized docker (i.e. only the its title is visible), the grip on the splitter's handle disappaears, then you are unable to resize the east region. As you can see on the screenshot, the handle does not show any dots.
Created attachment 70087 [details] east region is locked
Yes, I can confirm. This is a strange result of minimizing...
*** Bug 260494 has been marked as a duplicate of this bug. ***
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