dragon.exe processes not being terminated on closing Dragon

On closing Dragon, one or more dragon.exe processes can be left. Looking at them with Process Explorer, they appear to be processes created when an external program displays something in the default web browser - in this case Dragon. For example, an e-mail that has a clickable field to display it with more graphics or to view a video.

It seems to happen when Dragon is already running, thus creating a new tab. If not running - the display causing a new Dragon to be launched - the condition doesn’t appear to occur.

This started with version 57. Currently using 57.0.2987.93 under 32-bit Win 7

The Bug Report section doesn’t seem to want problems posted there until it’s been confirmed as a bug, so I’m posting here. Any suggestions? Or should this be moved to Bug Reports?