Hello,
So I have been having an issue with the FMC as demonstated in the video. I have tried a re-install with no sucsess. This happens on the ground, and whilst in flight. All other knobs and displays work. I am running the 2.1.1 update with XP11.50b6. I am going to try a flight rolled back to the latest non beta version tomorow, however I though I may as well post here incase it is a known issue.
I had the same issue with the 11.50 beta. I monitor FPS and I noticed it froze and so did the flight. I believe all the KB functions freeze also. I did work around it by selecting another application from the taskbar, such as Chrome, and then reselecting x-plane, and the flight resumed. I also do not have engine sounds in the beta version, yet the callouts such as TO/GA, minimums, etc do work.