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We are using TRB140 with port forwarding and Zerotier vpn. TRB140 is connected to a siemens PLC. It stops sending PLC data after a few hours by itself. 4G connectivity is maintained. Shows online on Zerotier portal but data stops coming. On some TRB devices issue was resolved by upgrading to the latest firmware and Zerotier package but on some devices the issue remains. How can we investigate the issue? Current firmware on the device that we are testing is TRB1_R_00.07.02.4

Attaching the troubleshoot file.

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