Hi Gazmonalpha , i have the same issues. This not happens in instant action , create fast mission or load a single mission. Only in campaign ( and only in F15C). I try now , to load a single mission of the Bear Trap but not in Campaign menu , in mission menu and the issue remains.
I downloaded it another campaign to the F15C ( Spring Blood , in ED forums ) and the issues remains again!! In multiplayer missions , this not occur.
I would like to buy another campaigns to the F15C but I am discouraged ,yesterday DCS WORLD was updated but our issues was not fixed. :(