thumbnail missing from mobi file

the generated mobi file seems working file on mac kindle app, with correct thumbnail and poster picture. however, when i download into either pc or kindle device, the thumbnail seems to be missing. is this a configuration issue or something i am missing?

sorry for chasing again, any help? or I should raise in different place?

Yes, you were posting in a board for sharing tips on how you use Scrivener. :slight_smile:

Generally speaking though, if you have a cover image set in your compile settings, and it looks good in Kindle Previewer, then you should be okay. You can’t really trust how .mobi files look in end-user reader software. It’s a format designed for publication to KDP, not distribution as an ebook.