Max Grid Input Current not adjustable by app

I would like to set the grid input current of my AC300 using the advanced settings function in the Android app. If I want to change the currently set value from 1A to e.g. 2A, it takes about 5 seconds and the old value is displayed again.
What do I have to do to adjust the value?

Kind regards, Daniel

@d.hed Could you try updating the app and the AC300 firmware to the latest versions, then check if the adjustments are possible?
The password for advanced settings is eight eights (88888888).

Dear Admin,
the app and the AC300 are both up to date, but the current could not be changed.
AC300 : IOT v9014.12, ARM v4037.07, DSP v4036.30
APP : 2.3.14

Do you habe any further ideas?

@d.hed
Could you try disconnecting the input first, then adjust the current to see if it works.

I found the problem - i however have to deactivate the “quiet Mode” at the ac300 Display first. Then adjusting the current by app works.