Pacific Fighter glitch

I have found a fustrating bug in Pacific Fighters. In the first mission of the campaign based upon Squadron 30 (RAAF Beafighters, New Guinea, 1942), the rest of the flight crashes into a cliff face before they've gotten half way to the target (Buna airfield). That makes it fairly difficult for one's surviving beafighter to work its way through AAA defences to score sufficient hits on transport assets to enable the mission to be a 'success'.

Upon reading reviews, it appears that this bug is not peculiar to my experience of the game. You'd think that in such a generally brilliant game, such glitches wouldn't find their way into the final product...