real time monitoring versus finished logs

[Brazen Article]

Hello - My real time monitoring page shows the boat icon facing almost 180 degrees off the boat heading. It also correctly shows the boat speed while underway.
The finished log for each segment corrects the boat icon but shows boat speed as zero.

[admin]

Hi, the heading discrepancy you're seeing is likely due to the difference between navigation.headingTrue and navigation.courseOverGroundTrue as reported by Signal K. Monitoring and trip logging can use either value based on specific logic. Could you compare these two readings and check if they diverge? Assuming they do, check the sources they come from, there is probably a misconfigured device on the NMEA network.

As for speed, it should be synchronized. When reviewing your last log, we didn't observe the boat speed dropping to zero, although the wind speed was zero. Could you provide an example of a log where the boat speed reads zero? Both monitoring and trip logging rely on the same data keys for this, so there isn’t an apparent reason for them to differ.

[Brazen Article]

Thanks, I found a problem with one of the gps sources. Turned it off and Saillogger shows correct heading.
I'm underway now and boat speed is showing up, I'll check the log tonight. Attached is a screenshot from yesterday's log showing zero. It has been showing correctly while moving but zero on the processed log for the last several days.