From time to time, the A340 incorrectly determines that there is no further waypoint after the next one—but rather a discontinuity—causing it to automatically switch to heading mode and stop following the route.

Step climbs are still not being executed correctly in automatic mode.

Similar for me today,started to follow route and then stopped...pressed HDG and no input whatsoever,flightplan was correctly inserted using EFB sync'd with simbrief.

Hi,

So for the former issue I have noticed this as occurring every so often, I have assumed it to be something that occurs on a route basis and not consistently and chalked it up to an IRL navdata issue, similar to IRL waypoints that cause loops or other weird anomalies which is usually listed in NOTAMS. I'll ask the team about this just to make sure but I can recommend that one verifies the Flight Plan in it's entirety using the PLAN function and scrolling through the Plan with the MCDU to verify there are no discontinuities.

As for the second issue, I have noticed this happens when I flying max forward speed possible, they activate but at these altitudes, the weight of the airframe, and the oh so sweet efficiency of 4 CFM-56s, the aircraft executes the climb but spends the next 1000s of miles climbing at less than 50fpm in some cases, usually I'll reduce speed ahead of climb and then accelerate again post climb, or I'll just run the usual 0.83/.84M for cruise so the aircraft can still climb. Outside of that I tend to not run into this issue with step climbs so I wouldn't be to sure after that. If you would like to add a video from YT or Google Drive to the thread I would be more than happy to take a look at it.

Thank you :)