esp880 gets unresponsive without apparent reason
A client has a setup of 3 esp880 sharing audio trough 16x16 Dante Fixed I/O cards, everything is running fine but suddenly 1 of processors stops responding to CSR app, CSD can't find the processor and also CC-16 connected to it shows "comm failure" on the screen. Audio is still flowing between devices but I have no control over this particular processor. It has to be rebooted in order get control over it again.
I've checked power supply is 120VAC regulated. I've checked wiring for serial port connected to the CC-16 is ok. Network switches don't show any abnormal behavior on network traffic. Actually I've replaced esp880 because client has an extra esp880 as a backup but it keeps losing communication with CSR app, CC-16 and CSD 5.1
Have you seen this behavior before? Please any advice will be appreciated.