lx7007c logger query

I've just started flying with a new lx7007c and noyiced that in all the flights on See You the glider symbol is constantly pointing north. This looks very strange as it appears the glider is, at times, flying backwards!

On inspecting the IGC log file I see that there is no heading information logged, even though this is one of the four extra parameters that are capable of being logged.

I've changed the additional fields around and no extra information seems to be logged at all.

Is there something I'm missing and need to set something else in order to show the glider circling in thermals?

Paul