My very long book document (not a Book) normally takes 1-2 seconds to load. It took 4.5 minutes to load in 2.2. Once I re-saved it from 2.2 it loaded normally again.
Some of my archived 2.0 and 2.1 backups load instantly while the more recent ones take 4.5 minutes. I'm unsure why only the most recent ones exhibit this issue.
I tried re-opening the most recent version in 2.1 retail, changing pages, and using save as but that didn't change things.
The issue appears to be related to