I've noticed a few days where @SmallTownUSA et al, have failed to post. The overpass server they query from is very intermittently rejecting calls (as is their right), a bit of retry logic should help without being a burden on their instance.
Let me know if you notice anything else amiss.
https://github.com/watmildon/SmallCityMastodonBot/commit/8ae4fc54fcfa0476f8bcc4bca6c062a2434f9aa8