Hey,
I read the linked bugtracker issue and is my understanding correct the the problem with encrytpion is most probably related to the way of performing a factory reset?
I remember I used TWRP and not fastboot to perform a factory reset after I hit the SnooperStopper issue.
So can you @freibadschwimmer confirm that my understanding correct that only a fastboot full wipe (factory reset) will lead to the encryption problem and the wrong block size (-> necessary data partition re-size before it works again)?