This did not use to happen but after a Windows Update/dopus update can't really tell which, everytime I dismount an image Dopus crashes. It happened with the Mount-DiskImage cmdlet as well WinCDEmu which are both popular tools.
Not sure if this is just me.
Before that there was also a small recurrent issue of the mounted image not showing up in the file tree until a new lister is opened or you had to go to 'This PC' to see it mounted there.