"Page contains renderable text" error instead of size error

I just spent hours tracking down a problem with Acrobat Pro XI (11.0.19 in Windows 10 64-bit) giving a "Page contains renderable text" error. I have a PDF created directly from scanned TIFFs, and when running OCR on the document I kept getting the renderable text error. I tried recreating the PDF with other software and everything else I could think of, and consistently got this error. Even a single page created directly from an image gave this error.

Eventually on a whim I fiddled with the OCR settings, changing the setting to Searchable Image instead of ClearScan, and instead of the renderable text error received a different error message: "This page is larger than the maximum page size of 45 inches by 45 inches."

That explained the problem: the original pages were small, but clearly at some point in the workflow the image files were getting the wrong DPI setting and showing up with huge dimensions. So I went back to the image files and noted that they had the wrong DPI (72 instead of 600), yielding a huge page size. I changed the DPI with a graphic program, recreated the PDF, and it all worked fine.

Clearly Acrobat is throwing the wrong error message in this case. I wonder if many of the people who, over the years, have reported mysterious "renderable text" errors on this forum are victims of the same problem. !