Hi, You should be more specific to describe when and how the crash occurs, so that there is a chance that your bug can be reproduced and identified precisely.
Please also note that Laminar Research will not investigate on bugs related with third party addons. They only do this when the request comes from third party developers themselves. So you should contact Flight Factor instead :
http://flightfactor.aero/contact-us
That being said, I just performed a flight between LFOH and LFRB with Autopilot and usual procedures, I had no crash.
My versions :
B767 v1.1.28
X-plane 11.02b1
GTX970
Windows 8.1
All the best to you,
Guillaume