Primary Pi not recognizing my Pi running a P10 matrix

[paxtonb]

For some reason my primary Pi running FPP ver 3.5.3 shows that it cannot ping the address of my bridge Pi running my P10 matrix.  The FPP does recognize my 3 AlphaPix controllers just fine.  I did not change any parameters on the Pi running the P10 matrix.  I did add a new controller this year and it is connecting without an issue.  Any thoughts on why the bridge Pi won't connect?

[tbone321]

I would take a look at the Pi running the matrix and make sure that it is still connecting to your network.