Individual Collection Sheet Amount not modifiable - amount is fixed

[Gprocessor]

Summary:

Individual Collection Sheet Amount not modifiable - amount is fixed

Steps to reproduce:

open individual collection sheet
try to modify and save new inputted amount
an set payment type

Expected behaviour:
amount should change

Observed behaviour:

amount does not change and returns to the default loaded amount from the server

Device and Android version:

Screenshots:

Can be created by pressing the Volume Down and Power Button at the same time on Android 4.0 and higher.