MDC Select doesn't focused for pressed letter key

[rajaramtt]

Press the letter key form keyboard and It does not highlight the MDC Select option which started from pressed letter key. it should scroll the drop-down list and highlight the MDC Select which started from pressed letter from the keyboard.

Currently, It is not working., we have to manually scroll the list to select.

Angular Material Desing It's working:

https://material.angular.io/components/select/examples

Angular MDC Its not working :

https://trimox.github.io/angular-mdc-web/#/angular-mdc-web/select/examples