specific RSS-Feeds do not show icon and track information

When i add an RSS-Feed of a specific provider (Ö1, from the ORF in Austria) the Icons of the single tracks are not shown in the overview and the info for a track is also not shown.

Steps to reproduce

Describe the steps to reproduce the issue, like:

1. Add new RSS-Channel https://podcast.orf.at/podcast/oe1/oe1_panorama/oe1_panorama.xml
2. Go to the Channel overview
3. Show "Track infos" for a track
4. Edit track infos

What happens?

The trackoverview does not show the Icons (step 2)

The trackinfo is not shown (step 3)

The trackinfos are visible on editing the track (step 4)

What is expected?

Show track-icons and infos as on other joined RSS-Feeds also

Context

Funkwhale version(s) affected: 1.2.2+git.ddb7023f