Cursor is jumping at the last of form field when text is typed in between.

Summary

Using oj-input-text , cusror is jumping at the last on typing any character in between the form field.

Content

Using oj-input-text , cursor is jumping at the last on typing any character in between the form field.

Same thing is working when given <input> instead of <oj-input-text>

I have used the below code JS where 'firstName' is the id for firstname form field.

$("#firstName").on('input', function(){

    // store current positions in variables
    var start = this.selectionStart,
        end = this.selectionEnd;

    this.value = this.value.toLowerCase();

    // restore from variables...
    this.setSelectionRange(start, end);
});

But it is showing setSelectionRange() is not a function on using <oj-input-text>