Form: Add Ajax Handler - Not working for Numbers
Problem/Motivation
I would like to work with numbers and calculate the difference, hence I need ajax to calculate it immediately. However when I try with a standard text field, select list or radio button, or just title it seems it works as expected.
But if I try with number (integer) or (decimal) Ajax still tries to refresh it and won't save required value.
Here is video attached :20154029.mp4
I am using simple model on clean Drupal version:

It seems like very similar issue which was resolved with text field here :3360158.
Am I doing anything wrong or it is a bug?
Edited by drupalbot