I have used Elemental x before and I really never had issues, did you flash it on top of another custom kernel?are you on stock? OB? Are you using stable magisk build? You could try to dirty flash the stock fastboot ROM or just clean flash it. Also what's magisk modules are you using ?
No I flashed it on stock boot images, I was previously using Elementalx and also never had this issue, even flashed another on top of other custom kernel was fine for me, I guess something different is messed up, well i deleted whole magisk module directory via adb, you mean dirty flash full ota via fastboot? Can you confirm it I won't loose any data by dirty flashing all(by flashing all files one by one?).
I done it and I just did right now you won't lose data if you dirty flash you will lose root, when you first click on flash all it will go get you a message saying erase user data: y or N ,just type N . It will flash all the files again and you will still keep all your apps and data.
