[Nexus 6 Android Development] magnamentis:
i'm currently chasing the reboot issue with a bit more dedication and i'm now 80% sure that it's mainly a "THEME" issue, perhaps in combination with a few hardware specific parameters.

further i mounted a new battery to be sure that i have no such reason as a trigger. voltage fluctuations unfortunately don't show in any logs ;)

if i stay free of reboots i shall next install my themes via substratum app and if that as well goes well i shall return back to the swift installer that is giving a few more opitions which i suspect are exacxtly the culprit.

for one there is the theming of the settings app icons in accent color instead of stock multi-color and i remember that i had a bootloop because of that on my oneplus 6 recently, no reboots there and it works stable for a while now but it was a very similar impression i got there.

i'll post further findings as soon as i verified all my suspicions, stay tuned.

BTW i'v been on swift installer while i never had issues with swift black via substratum app, just in case anyone would like to add his findings or verify mine

---------- Post added at 06:52 PM ---------- Previous post was at 06:20 PM ----------

sounds like knowledgable while in fact the part about wiping caches is totally superfluous, in fact twrp offers to wipe caches after flashing for the reason that iif performed ART cache is rebuilt and without it isn't and works 99% as well as before.

there is simply no reason to wipe caches beforehand while it doesn't hurt either. only thing that catches my eyes if if someone makes a straight forward process, boot into twrp, flash rom, magisk (mostly not needed but safe to do since it costs nothing) and kernel (if a custom kernel is used) and there you go, all other things are sticking and the system partition is wiped during the flashing process and gapps are backed up in stay as they were. gapps should not be re-flashed over a running rom (dirty) because some newer app versions would be overwritten with the gapps variant, gapps that were updated in the background between moment of flashing the rom and when the gapps were last updated, this can lead to serious unaccounted for trouble and make a clean install necessary.

users who often speak for clean installs always probably have a relative simple and standardized setup while i can say that to setup my device in full with all the details running again and even with the use of TiBu takes at least half a day net, in fact even longer. that makes it a very long list to post for explanation but what i want to say is that those who speak like a cleany would be just a bit more work should consider that it's not that easy for everyone. as one of many example i'd mentioned a setup with more than 10 email accounts while only 8 are from google only the number of logins and the setup of smtp servers from private business servers takes it's time, not even talking all automatisations as well as notifications setups to distinguish emails and all the social media channels order by groups.

a backup is recommended but as well not mandatory, worst case would be to flash clean which in case of a fail is recommended anyways.

this kind of post leads to all the back and forth discussion in case of problems because dozens of users insist on their "special" way to flash while in fact it's simple and straight forward and all the fuss is only adding to newcomer's confusion.

dirty is dirty and hence does not have to be made sounding especially demanding or complicated.