I recently upgraded to 2017 Creative Cloud version of InDesign. Now, if I inadvertently click 4 times using the text tool, it selects ALL text. When I then try to unselect it, it takes 50-60 seconds for that to happen. Any way to disable the selection in the first place?
Clicking four times with the Type tool in InDesign CC 2017 for me selects a paragraph, not all the text.
Try restoring your InDesign preferences:
There is a preference setting that changes the behaviour of the four-times clicking (as well as triple clicking):