The setup is:
4 Shure Quad Receiver (Dante Sync Slave)
1 SSL House Desk (Dante Sync Master)
1 Lawo Desk Broadcast (Dante Sync Slave)
1 Soundcraft Desk Intra/Internet Streaming (Dante Sync Slave)
1 MacPro, Live Professor2, RME DF Madi (Dante Sync Slave)
All the units are within a redundant Dante network and the Mac with the DF acts as a Plugin insert server for the Lawo and the Soundcraft desk.
During the show the sync setup is like above but sometimes we have to start the rehearsals without the house desk and therefore anything else has to be the master. Normally it's one of the Shure Receivers cause it' easier to set them up in the Dante controller app cause all 3 desks have different setups within the desk when they have to change the master/slave role.
Up to now, no problem at all.
One day, we just needed 6 wireless handhelds and 2 of the Shure receivers where switched off there were no selected preferred master in the Dante controller app and Dante set the DF Dante interface as the master.
From then on we had a click everywhere every second.
In the Dante controller app I set one of the working Shure receivers as the preferred master and all was fine, setting the RME as the preferred master the click comes back.