Just tested, with jewel enabled it never showed a spinner but waiting probably 10 seconds the image finally appeared.
It is absolutely faster to use my work around though. Even if you were to consider the possibility that it’s loading the image silently in the background after exiting, that wouldn’t explain why it’s so much faster to use my work around.
fwiw, most of my artwork is 4k. I use Ember Media Manager to get the images.
Edit: I just tested with iPad. Same experience. However, due to the nature of the floating panes, my workaround on iPhone does not work on iPad. iPhone seems to unload the pane that shows the details. It is doing this that allows it to display it more quickly when load, unload, load happens.
For test comparison I can load same show on both iPad and iPhone at the same time, leave iPad alone, and use work around on iPhone and before iPad has loaded the image iPhone with work around will be done.
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UlfSchmidt - I have around 50 shows as well, with many hundreds of episodes. I can’t imagine the number of shows would affect anything g though as you only view show details one show at a time. The banner art for all the shows loads just fine. Which is interesting as one would think loading in banners from many shows, each with around 1k resolution (the max banners are sized) would be slower than loading a single high resolution poster. I really think something is not working right.