Not sure if this is a VollaOS or Android issue, but I've had a lot of problems when updating to 11. One is that I can't get the phone to charge wirelessly anymore. I'm sure this is a software problem, because I have a few wireless chargers that work fine with other phones. I've done a factory reset, and that hasn't solved it. Some websites advise "wipe cache partition" in recovery mode, but that's not an option on the menu. Any others have this issue? Can it be fixed?