When experiencing bugs with the Mugshot application, your way of helping things getting fixed is to report a bug about it in Launchpad.
-  Camera Capture window freezes at launch (2018/11/25 14:51)
-  Mugshot: "forgets" information which was filled in (2018/06/02 18:05)
-  Mugshot: does not ask to update pidgin details (2018/06/02 17:40)
-  Mugshot crashes on Debian Stretch (2017/12/15 07:41)
-  Mugshot closed unexpectedly (2017/10/29 10:35)
-  Mugshot does not recognize the pwd nor activates fingerprint scan (2017/08/17 17:06)
Report a new bug
If your bug/problem has not been reported before, report a new bug. Please ensure that you disclose any information that might be relevant for developers reading the bugreport, e.g. what distribution you're using, what package-version of Mugshot, etc. To report a new bug, go here.