It’s absolutely a bug in Cubase pro 9.5.30.
Hardware rack is missing for the MR816csx.
Uninstalled Cubase completely, then reinstalled drivers and tools for MR and reinstalled Cubase 9.5.0. Hardware rack was present in CB9.5.0!
Updated to CB 9.5.30 and the hardware rack for MSR816 was gone.
I repeated the procedure twice with the same result.
No hardware rack for the MR816csx in Cubase pro 9.5.30
Steinberg please?