Hi, I've observed something similar, in the deployment of a Dante audio network, as audio specialist, we got mixed answers from the IT company that deployed the Merakis, they even analysed the problem with Cisco support. No fact based answer. The information that came out was a problem with multicast tables synchronisation in a stack. No idea if it is an officially reviewed bad config or a bug, but destacking and setting LAG off solved the problems. Only took 11 months to solve :). Thanks for posting @IsaacG as your post was the trigger for a review of the system (the possibility that switching  was the problem). ... View more