Hello @thinkmediaco,
I believe Daniel Lewis covered this on his podcast last year, what is displayed in the iOS app is not fluid unfortunately.
When searching for a podcast, the episode iTunes:image tag is displayed within the episode search results. Please test by doing a search in the iOS podcast app to confirm.
Once you are subscribed, the program level view will use your program level itunes:image. When you click play to play a specific episode, your program level image continues to be displayed. I believe if you have different artwork in the ID3 tags (this is the image in the media file), it will display that in some podcast apps, but from my testing it still shows the program level image in the iOS podcast app (not the episdoe level image). Please test by doing a search in the iOS podcast app to confirm. When you click another episode the image does not re-load either, its static to the program, not the episode.
If you do not like this behavior, I would suggest contacting Apple through the podcasts connect portal and complain about it. I personally agree, if you set an itunes:image for an episode, it should display when you play that episode, but I also understand that at any point when you are playing an episode you can start playing another episode in the playlist, this action does not change the show information at the top, which I think was the design goal that Apple had in mind (program info at the top, episode at the bottom).
I personally have found that having separate artwork on a per episode basis is a double edged sword. When using search, it can sometimes appear as a bunch of episodes from different podcasts. if you see the same artwork for all of the episodes in the search result it is more compelling to the user that program and its episodes are more relevant. On the other hand, if you are putting content in the image that is specific to the episode and you reference it in you recordings, the listener is going to want to see it. This is all preference really.
I have yet to see an Audiobook series or mp3 music albums use separate artwork for all of the files, they all use the same artwork.
If you have ever dug into apps like NetFlix, Amazon Prime or TiVo, many shows use the same artwork for every episode while others use different artwork for every episode. Even the professionals haven’t made a decision what is better or optimal.
Do not let this dissuade you from doing what you are doing, I am just sharing what I’ve observed with apps and other types of content.
Thanks,
Angelo