Local and remote machines both running TV13 on Win10. Don't recall seeing this problem on TV12. Problem does not happen ALL the time, but sometimes it gets stuck.
When working on a list of things in Windows, like File Explorer list of files or Outlook list of emails, the normal Windows keystroke behaviour allows you to click on one list element and then shift-click on another list element to select all of the list elements between and including those clicked. Right?
So the "stuck" thing is because a single click appears to always act like a shift-click and select a range of elements. It's as though the shift key got stuck down. When you are presented with the list, one element is usually highlighted. Clicking on any other element acts like shift-click and selects multiple items, instead of just selecting the newly clicked item. Seems to be no way to stop this.
We've tried fiddling around with the shift key and holding it down to engage the Windows "sticky keys" accessibility aid and turn it off. Nothing has helped. Exiting TV and coming back in usually helps.