I have reproduced the issue. To make sure we are on the same page, your tracks do not have cover embedded in them, however you put a cover.jpg file in the album folder which is then displayed in Audirvāna.
You then wanted to change this file with a different one, but it is never updated in Audirvāna. Can you confirm this?
I’m afraid that the issue is not yet resolved
It seems that the album image is only updated if one of the album’s music files is renamed.
In the search result I first saw ‘Offspring’ and ‘The Offspring’, but after changing a track file name, the album image was updated and the correct album artist was listed in the search results. The file path remained unchanged.
Almost immediate update: Change of track title and/or track artist
After filename update: Change of Album artist and/or image (Folder.jpg)