PS Audio Bridge II Not Showing Up

In the past few days I’ve been getting very unreliable connection to DS Bridge II. I have been using it for several months and had no issues. Two days ago I had to power down the server (and the router and when it came back the Bridge II was not recognized, more accurately it showed up for few seconds, shortly played music and disappeared. After multiple reboots router/server/DS the connection stabilized and played music for several hours. (see PS Audio DS+bridge can’t be found).

There was a subsequent power outage and having now the same problem except this time cannot make the connection stable even rebooting the the devices (in different sequences) multiple times.

The USB connection works fine.

The server is a Mac Mini connected with ethernet cables to any Apple Extreme Router to which the DS connected by wires, Wifi is off. (There is a second Extreme router connected in bridge mode to the first router with wires - the second one has Wifi enabled - the server is not connected to it)

Please advise it has been aggravating.