First 2 flights, both with FMC/flight path freezes

[Mantock]

Strange thing happening here.

 

I've only done 2 flights so far, but both have had the same issue, about 1-2hrs after departure in the cruise, I notice all of a sudden that the MCDU's are frozen with no way to input or change anything, the aircraft also locks me out of changing any autopilot inputs and goes into what I assume must be heading hold, as it drifts off the track in a straight line for eternity. Not sure if anyone else is having this issue or not, but I'm concerned to see it twice in a row on my first two flight attempts!

[Jure]

Happened to me while still sitting on the apron. I was going through preflight and MCDU simply stopped responding.