Android 4.4 / Backspace bug with certain masks

[burakicel]

Hey, I am using UI mask on Android 4.4 (Kitkat) in an Ionic project.

Mask I am trying to run is "+1 (?9?9?9) ?9?9?9-?9?9?9?9" for the phone number. I did this because I want the country code to be pre-populated. What I noticed is that if I try backspacing on androids native keyboard when there is no input, I will get additional "1"s appended to my phone number. While all I pressed was the backspace button.

I confirmed the bug by also running the demo page on a Kitkat browser.