Authorization tokens missing for EPUB 3.2

Hey there,

I've been having a problem authorizing my EPUB 3.2 books from Overdrive on my eReader device--looking into, it seems that there's a crucial error wherein the authorization token often isn't being written onto the device from ADE (4.5.11) when transfering; this happens both on MacOS and Windows. I've tried several varieties of EPUB and it seems like this is only occuring with v3.2 (this never has happened with any of my v2.0 EPUBs at all). Has anyone else experienced this/is this a known error with ADE?