You can either use:
1. System Update (Works for ColorOS Stock Recovery):
1. Download and copy the package to the root directory (meaning don't put it into any folders) your phone storage
2. Make a backup with the stock Backup & Restore app
3. Open System Update -> Local Update -> Tap the update package -> Wipe data and update
4. Wait until the update is finished then tap Reboot
5. Power on and use the Backup & Restore app to restore your data.
or:
2. Recovery Update (Works for All Supported Recovery):
Please find the instructions [CLICK HERE].
Special Thanks
Special thanks given to @El Porcharo who helped making the buglist and catching logs, your enthusiastic work made the bug fixing much easier for us.
Thanks all ColorOS Advisors and Ofans for the support on bug reporting and suggestions, ColorOS is getting better and better due to your love and support.