BackSpace Removed All Input Characters Before Special Characters

[OsamaFayyaz376]

Hi , If my mask is (999) 999-9999 and I do a backspace before '-' it will remove all the front integers/input as well and the final string will be like this (999) 99

Input : (123) 456-7890

After Doing BackSpace before '-'

Output: (123) 45

Output Should Be Like this: (123) 457-890