Not sure about the command you are asking me to execute /opt/MMDVM_Bridge -v
This results in command not found. I think you are asking for the version of MMDVM_Bridge which is 1.6.1 for the NXDN bridge.
Attached are 2 log files, one from the NXDN bridge log and the second from the FCS bridge log. These were copied from the MMDVM_Bridge log showing my transmissions from FCS00479 and resulting log entries seen from the NXDN MMDVM_Bridge. As seen on the NXDN bridge log after each FCS transmission is received on NXDN at the end of those transmissions the log shows the Network Timeout error and no TX OFF log entry, causing NXDN to stay in receive mode. The last transmission shown in the NXDN bridge log is from me transmitting from TGIF DMR showing a valid NXDN TX OFF log entry which then allows NXDN to pass new NXDN transmissions back through the bridge to HBlink3 master.