i just had that too, i needed to flash Disable_Dm-Verity_ForceEncrypt AFTER you flash rom and now it works
Seems notification and charging led are broken. Going to check on 8.10 again if they were working on that build. But afaik they did.
To add to this: for me it got worse with the recent updates. From sporadically every couple of days (August Version) to at least once a day with the latest build. Mostly during deep sleep at night and irregardless of the device being on battery or charging.
*** Disclaimer I am not responsible for any damage you made to your device You have been warned