Cover art for TV show keeps reverting

Hello, if I change the cover art for a TV show, it only saves for existing recordings. When the next episode of the show records, it goes back to the default cover art, which is outdated. Is there a way to change it permanently, or change the default that is assigned?

Alas, no.

This is still an issue.
I opened a support case with Channels and they told me to contact Gracenote, however they do not seem to provide any support as they will not respond to my messages.
Channels needs to provide a solution to this issue. If the art is wrong from Gracenote, that's fine, but if I manually correct it, it should remain changed, not revert back to the wrong art whenever I delete an episode and a new one is recorded.