A350-900 automatic step climb does not work

[SansLonely]

The automatic step climb does not work in the A350-900. All setting are enabled, and the functionality is perfect in the A350-1000. However, in the A350-900, it displays that the S/C is approaching, and once the aircraft reaches the waypoint, the display changes to Automatic Step Climb. However, the aircraft won't climb to the new level. It does however climbs if you use the A350-1000. This is for MSFS 2020 version.