Problem starting Advanced Graphing App

[retoa]

Hello

I have a problem with the Prime of one of my students.
When I try to start the Advanced Graphing App, the Prime does a restart. After the restart the active App will be "Function", independently of what App was active before.

The same happens when I recall the a variable of the Advanced Graphing app with the "Vars" key. Also here the active function after the restart will be "Funcion".

Does anyone else already have the same problem?

What should I do to fix it? (Tried the reset pin without success)