The module always tries to load captions for every entity, with one SQL query for every entity loaded.
It should only try to load captions if there is an image with captions enabled to load.
Closed: outdated
2.0
Code
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It's likely this issue predates Contrib.social: some issue and comment data are missing.
Probably a really good patch. Looks like you spent a good amount of time on it. Too bad we never got around to committing it. Sadly no further additions are getting added to 7.x
Marking all 7.x as out of date. If the problem persists, then only a new issue.