Same problem with Mission 7, crashes immediately after the comm check ("Raven 14"... crash) after switching to 303.2.
Running the latest open beta, Rift S, no mods, recently verified integrity of files with Steam.
Had a similar crash in Mission 3. I actually completed it fine the first time, but when I went to replay it it crashed consistently in the exact same spot three times while heading to the get well waypoint. I don't think there was any beta update in that time, so clearly this is a bug in DCS or the campaign triggered by some sort of mission event, but it's intermittent.
I don't have the logs any more, but I recall the error log for the Mission 3 crash was something like "sound render time exceeded allowed slice"