I seem to have lost my duel channel mode, I used to be able to choose between Auto 2.4 or 5.8, think that's what they are, its grayed out now at 2.4 and cant change it,, not sure if this happened since the last update or not

relinking sorted it

Hi, we're sorry for the inconvenience that it caused. I would like to clarify if you've managed to fix the situation by re-linking your Smart controller to the Mavic 2 Zoom? Please let us know for further help.  Thank you for your support.

Yes fixed by re-linking