OS icon not updating after OS change

After changing a server from one OS to another the OS icon does not get updated.

For example: Server with Windows OS has an Windows OS icon and gets recognised as such OS. After changing the OS to for example Linux Debian. The Operating system description gets updated but the icon stays a Windows OS icon.

So the description and OS text gets updated automatically, however the icon doesn't.

A workaround is to login to the database of Observium and run the following SQL query:

// update devices set icon = '';

After this the icons get updated again with the right icons.