I wrote a simple module to keep the daemon running and haven't noticed the "Magisk Not Found" error since. The module is just a simple bash script executed as service on boot that checks every minute for the daemon and runs the "magisk --daemon" command as root if not running. I am just posting it here to see if it can help anyone else who's root access disappears randomly on v17-19.3.
Please be aware that this is my first module ever. It was also originally started via an init.d script instead of the service hook in magisk, though it should work exactly the same.
Magisk Repo Submission:
UNINSTALL INITIAL v1.0.0 RELEASE BEFORE INSTALL!!!
If you fail to do so you will have the old version and current version running at same time.
Current Release v2.1.0
Major thanks to @jcmm11 & @char101 whose contributions are now officially included in this module.