Cant read the event methods in the event listener in android 9 and android 10, using samsung browser in webview

Question

I have written a JS code for a webview, which is an OTP input, with 6 inputs fields, with JS handling the cursor shifting once the user has entered. In order to do this, I have added an eventlistener, I am using the event from that listener, which gives methods and variables: event.key, event.keyCode. I am not able to call focus method of the input field as well.

It only doesnt work in samsung android 9 and 10, which is using Samsung browser under the hood when opening that web view.

any ideas how to resolve this?

for (let i = 0; i < inputs.length; i++) {
        inputs[i].addEventListener('keydown', function(event) {
        if (event.keyCode > 47 && event.keyCode < 58) {
              inputs[i].value = event.key;
              if (i !== inputs.length - 1)
                inputs[i + 1].focus();
                //checks for "enter" key 
              event.preventDefault();
           }   
        })};