cover art
When the cover art thumbnail is incorrectly displayed in Primo/Discovery, we have the ability to correct it by searching for the image and inserting an 856 or 956 tag in the bib record. When the cover art is incorrect in Alma, there is no ability to correct the Alma display ourselves. The solution offered by ExLibris is to contact Google books and submit a correction. Unfortunately, when I checked one such title, it was displaying correctly in Google Books so I don't know why it is not displaying correctly in Alma. In this case I would like the ability to overwrite the default cover with my own cover art.

-
Stacey van Groll commented
The display is by ISBN/ISSN/LCCN according to OLH (some of the pages don't mention LCCN, while others do).
In such cases where the image is wrong in Alma, perhaps check to see if the identifier is correct in the bibliographic record?