Steps to reproduce:

1. Create a submap with <Icon Highlight> option checked
2. Insert in the submap an Host with a high problem (=> highlighted in red)
3. Duplicate the Host and set an application to filter the problem (=> no highlight - see HostApplicationFilter.jpg)
4. Create an upper map and insert the submap

Result:
In upper map, the map element (linked to submap) is not highlighted (screen shot uppermapissue.jpg) despite the fact that submap contents highlighted host (see screen shot submapcontent.jpg)
Expected:
In upper map, the map element (linked to submap) should be highlighted (screen shot uppermapexpected.jpg)