Endless Optimisation Restart Loop after OOS 17.01 update (encrypted + OpenGAPPS)

I just had a little chat with @anon36364121 who is not sure he sees a specific issue with encryption here.

Is someone with encryption and OpenGapps brave enough to try updating to 17.02 - following the update guide to avoid the usual issues that may arise - and see if they experience this issue again?
“This issue” means you get into a bootloop without the ability to:

  • enter recovery or
  • re-flash OpenGAPPS or
  • do a hard reset.