I'm having the same problem, I've been simming since the early 80s and am fully conversant with the workings of FSX.
I've dealt with Just Flight for many years and this is the first aircraft I haven't been able to 'fix' myself (I've still got the first Concorde).
Hopefully there will be a fix soon.
Not sure this is something that requires a fix over and above those applied already. Make sure you have the latest version of the software and if you are having problems your best bet would be to contact Just Flight support and they can look into it for you.