Unable to identify package based on windows for some applications

When running ubuntu-bug -w the following message is output to terminal:

Gtk-Message: GtkDialog mapped without a transient parent. This is discouraged.

Clicking on windows from GNOME Terminal or Backups has not effect. Clicking on a Firefox window however, will trigger the expected behavior. It seems ubuntu-bug -w is only recognizing some windows.

ProblemType: Bug
DistroRelease: Ubuntu 17.04
Package: apport 2.20.4-0ubuntu4.5
ProcVersionSignature: Ubuntu 4.10.0-32.36-generic 4.10.17
Uname: Linux 4.10.0-32-generic x86_64
ApportVersion: 2.20.4-0ubuntu4.5
Architecture: amd64
CrashReports: 640:1000:122:995835:2017-08-12 12:30:28.203223748 -0400:2017-08-12 12:30:27.252524580 -0400:/var/crash/_usr_bin_update-notifier.1000.crash
CurrentDesktop: GNOME
Date: Sat Aug 12 13:40:46 2017
EcryptfsInUse: Yes
InstallationDate: Installed on 2017-08-12 (0 days ago)
InstallationMedia: Ubuntu 17.04 "Zesty Zapus" - Release amd64 (20170412)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: apport
UpgradeStatus: No upgrade log present (probably fresh install)