To flashlight, or not to flashlight … that is the question 
Everyone who reports a successful install, please let us know if you are able to shut down the device successfully without turning the flashlight/torch on right before shutting down.
Update 17 Nov 2018: Thanks for all your responses, I think it is clear by now that the shutdown bug persists with all FP2s running Android 7 (or the latest LineageOS) with the 12MP camera module. By now, please only report if the shutdown problem does not happen to you although the aforementioned conditions are given.