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Anything that is unrelated to elephants is irrelephant Anonymous - The problem with quotes on the internet is that you can never tell if they're genuine Winston Churchill, 1944 - Never argue with a fool. Onlookers may not be able to tell the difference. Mark Twain
Just recently some new weirdness with Windows has started happening. If I right click to bring up a context menu, often the selected item box remains on top of all other windows on the screen after it has been selected, and the operation completes. If I swipe to a different virtual desktop the box goes there as well. The only way to get rid of it is to shut down (sleep or hibernate).
Very rarely, but I've had it for years on different machines and even different versions of Windows...
What usually helps for me is to go back to the program the context menu belongs to and opening the context menu again.
I think I've had two or three instances where even that didn't help and restarting the computer was the only option.