Every time you switch to and from NAV whatever weapon mode you selected gets changed back to default. This group change should be persistent.
Heya,
yes, that was an oversight from us. The reason why it is not persistent is because when you swap to NAV mode you actually gain and loose control of certain controllers. I’ll see if we can add a quick fix for that but chances are not too big … because the old weapon group system will get replaced anyways soon with the so-called weapon preset system that comes along with the RN patch (which will have weapon assignments persist between mode changes).