Originally Posted by fatih.askn
don't flash patched boot with fastboot mode! if u use fastboot, your signal doesn't work. try magisk inactive slot method
Thank you for the inactive slot method tip. Without you I would've never known of its existence.
For others: when the Ota is done installing and proposes to restart your device: don't. Open Magisk instead, choose Install Magisk and choose the Inactive slot method. Then when Magisk is done patching it proposes to restart your device. Then you let it do that and your done.