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While using the desktop app on Sales Force Classic, the popup that should comes up after clicking on a phone number often take 10 to 30 seconds to appear or not at all. This is very random, will work for a string of calls then stop. Then start working again then stop. Closing the browser and reopening, logging off then back on has little or no effect. Win 10 all updates done on Chrome.

A wait or kill dialogue box often shows up after a number (less then 30) clicks on a different phone number are ignored.