Preflight Error - "Type too small"
Working in InDesign (18.0) on Mac
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I got a preflight error that one of my master pages had too small of type. Type panel and transform panel all read normal. I've never gotten this error before.

I could transfer the master page to another document and it wouldn't have the error. I could copy a matching text box or create a brand new one into that master page and it suddenly would have the error as well.
Through some trial and error, I was able to isolate the problem to a single page in my document that had that master page applied (but looked totally normal). Once I completely deleted that page and created a new page and reapplied the master, the error went away.
Anybody know what could have caused that? That page was absolutely fine before today, and there weren't even any edits to that specific page recently. Absolutely maddening.
