15
GraphineOS laggy and buggy :(
(hexbear.net)
On the road to fully automated luxury gay space communism.
Spreading Linux propaganda since 2020
Rules:
Did you do a clean install when you set it up?
This would be my guess too. Weird things happen if files are left behind by the old OS. Otherwise they should be able to reinstall it, or the stock ROM using the instructions on the website.