Yes I have this but right from the beginning, restarting does not fix it, repairing does not fix it or a fresh install.
Hopefully it can be fixed soon as it's unplayable as it is.
I have this too. 1.2 is fine, 1.5 no cockpit sounds other than electronics and a few other random noises. No engin noise, although it can be heard in "F2" view etc. although it doesn;t sound quite right.
Just registered to mention that I too am having this problem. 1.5 is fantastic but this is kind of a dealbreaker.
Is there any news on a possible fix at all?
Thanks everyone.