Serious performance issues with Engine OS 3.0+ on SC6000M

I had not yet done a factory reset, but I thought to try something different, and had performance issues yesterday, where a client deck stuttered/slowed down.

I configured things this way:

                  ________
---------------->| 1GbE   |<------------
|            --->| Switch |<--         |
|            |               |         |
|            |               |         |
1            2               3         4
Client    Primary         Primary     Client
to        with            with        to
Deck 2    internal        internal    Deck 3
          SSD             SSD

And I had a client have performance issues with playback, telling me this is likely something internal to the OS, where there is another task taking higher priority. I should mention that ALL decks have wifi and other non-essential services like Tidal/Beatport/etc. turned off.

Here’s video with the issue looped 3 times for clarity: Deck Denon Issue June 12, 2023 - YouTube