Stability update is necessary for nokia 6.
after updating to oreo 8.1 nokia 6 got a lot of problems
notification sounds are not playing, in call notifications are not working, phone is hanging and crashing frequently after july 2018 security update.
NOKIA 6 NEED STABILITY UPDATE.
no, you have only to make a hard reset once. "Dirty" installatiosn are always buggy and messy.