Impossible to exceed the altitude of 26,200 fee withA320 neo

When I am on autopilot with Airbus A320, it is impossible to exceed the altitude of 26,200 feet. The engines slow down automatically even i I indicate a FL 32000 and vs 1600 for example.
Your advice?
Thank you

At the moment there is an issue with live weather causing this, you most choose a preset weather setting rather than live and it should be fine. still annoying but its the work around

Since yesterday there has been an issue with high temperatures at or above approx FL240 that is affecting all aircraft above this altitude. More details in this thread

I will close this for now to keep all comments in the same thread.