Story Thumbnail Often Incorrect

Hello! I have a subscription to both Newsblur and Inoreader and often do comparisons to see which to continue support moving forward.

I’ve noticed that often times story thumbnails are incorrect or completely missing.

Newsblur:

Inoreader:

I can’t explain the missing ones… for the third article, that picture DID appear in the story, but it was the last image in a long line of clickbait (it IS TMZ, after all).
For the second article, it appeared in the story, too but it was in the middle of the clickbait stories.

Just curious how Newsblur seems to struggle catching the right (or any) image whereas Inoreader seems to get the right one every time.

Thanks!