I posted this exact message:
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My old post for this seems to have been culled, so I'll type it again as I believe this is a bug that needs to be addressed.
Our main host has a BCF2000 connected via midi cables to the RME HDSP 9652 card.
When the remote host is flipping between monitor mixers, the midi TX and RX lights on the BCF2000 attached to the main host light up and if you're moving a fader on the main host, the fader resists movement momentarily.
The remote PC has no midi surface attached to it or configured in SAC, only the main host does.
So something from the SAC Remote is triggering midi messages on the main SAC host.
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Shortly after it was deleted, so I posted it again and now I've been banned.