I had a similar issue. If you have a 10g ethernet port that may be the issue. After troubleshooting with Audinate my issue turned out to be that Dante doesn’t pass through the 10g ports from apple because of an apple driver limitation. The work around was to forward all multicast traffic to the specific switch port for the dante device with the 10g port. Its very frustrating along with the other issues dante has had with the M1 series of Mac Mini’s and the continuously changing fix dates from Audinate. Another work around is a 1g dongle.