Still no root

[0x4ndy]

I'm on Samsung Galaxy S9, Android 10.
I've installed the adb_root module and rebooted.
When running adb root, I get:

adbd is already running as root

But when I then do adb shell, I'm still unprivileged user:

I've tried to run adbd insecure in recovery, then connected to my PC and run adb shell and my shell was root, but this doesn't happen with adb_root as magisk module.

Is this a known issue? Any idea what is wrong?