I can create new thumbAsset for video and audio entries and they are working fine when visiting the thumbnail service URL (http://YourKalturaServer/p/{partner_id}/thumbnail/entry_id/{entry_id})
But for image entries, custom thumbnails are not working. I can see the tag property of thumbAsset object set to “default_thumb” but neither KMC nor thumbnail service gets the new thumbnail.
Can image entries have custom thumbnails? Are they any different than video or other media entries?