Head-Up Won't Display on Es12

Hello,

I like to view my vessel's progress with the "Head-Up" option in the Lighthouse II charts. I can configure this option in virtually all of the pane configurations on both my Es12 and Es7 displays. However, on the Es12, I cannot get the Head-Up option to save when I try to view the chart in full screen. I go through the same process that has been successful in other panes, but the full screen chart on the Es12 (only) always reverts to North-Up.

Suggestions welcome.

Thanks.