a certain process icon gets much bigger than the others

[Pablo Almeida]

When running Tixati (not available in the Software Center, but available as a deb), its icon in the processes list on System Monitor is much bigger than all the other icons. I couldn't find another program which triggers this behaviour.
Screenshot attached.

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: gnome-system-monitor 3.15.91-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Mon May 4 20:19:21 2015
InstallationDate: Installed on 2015-04-26 (8 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
SourcePackage: gnome-system-monitor
UpgradeStatus: No upgrade log present (probably fresh install)

[Peter Jonas (shoogle)]

I get this problem with Openshot. The icon is huge in the System Monitor and also all of the Openshot project files (.osp) have huge icons on my desktop and within Nautilus.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Victor Perevertkin (extravert34)]

Similar issue with pgadmin3 (see screenshot). If I close pgadmin and then reopen it (while system monitor is running) icon size changes to normal, but if I reopen system monitor icon becomes big again