Pressing the little "X" instead of "Cancel" makes Apport unresponsive

I have recently noticed that when running Apport, if one presses the little "X" to close Apport during the time when it is collecting or sending the bug information, instead of it behaving as though you have pressed "Cancel" and closing, it becomes unresponsive and I am asked if I would prefer to "Wait" or "Force Quit" and I am forced to "Force Quit" because it is completely unresponsive, there's nothing else I can do.

ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: apport 2.19.1-0ubuntu5
ProcVersionSignature: Ubuntu 4.2.0-30.36-generic 4.2.8-ckt3
Uname: Linux 4.2.0-30-generic x86_64
ApportLog:

ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CrashReports:
 640:1000:115:252353:2016-03-04 13:54:37.958497524 +0000:2016-03-04 13:54:38.958497524 +0000:/var/crash/_usr_share_oneconf_oneconf-service.1000.crash
 664:1000:115:0:2016-03-04 13:54:40.334540276 +0000:2016-03-04 13:54:40.334540276 +0000:/var/crash/_usr_share_oneconf_oneconf-service.1000.upload
 600:108:115:0:2016-03-04 13:54:42.614611375 +0000:2016-03-04 13:54:42.614611375 +0000:/var/crash/_usr_share_oneconf_oneconf-service.1000.uploaded
CurrentDesktop: GNOME
Date: Fri Mar 4 16:14:38 2016
InstallationDate: Installed on 2015-12-10 (85 days ago)
InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Release amd64 (20151021)
PackageArchitecture: all
SourcePackage: apport
UpgradeStatus: No upgrade log present (probably fresh install)