Let me just say first that these forums have saved me time and money multiple time over the years, Thank You.
Just had this problem with my brand new mr816x
Bought a brand new setup and chose the Steinberg interface as my interface(being a Cubase user and all).
The audio dropouts in my case seemed to happen every 10 to 20 seconds on the output channels only. I tried all the things in the threads one at a time and reversed the changes if it didn’t fix it. In my case it was the use of the legacy driver for the FW card I was using. that’s all I changed and it seems to have worked in my case. Changed the driver to the legacy did a reboot and everything worked ! Thanks again