I’m using current version of Sumatra. If I try to open PDF document with OCR layers under image, rendered by FineReader then Sumatra takes forever to open such document. Sometimes running optimization over such PDF (i.e. using shrinkpdf.com) might help, but in 90% cases it doesn’t. At the same time Adobe Acrobat Reader and most other readers can open such documents instantly.
So, this appears to be a major performance issue. Hopefully it can be fixed shortly.
P.S.: link to sample PDFs (image only and OCR versions of the same pages) https://github.com/sumatrapdfreader/sumatrapdf/files/1351938/Sample.zip