ChromeOS App - mouse pointer position issues when after changing resolution on local Chromebook

I am using a Chromebook with the App to remotely access devices. It works somewhat, but if my Chromebook is not set to its native resolution (1920x1080) the mouse pointer does not go where it should. I cannot even send a CTRL-ALT-DEL -- can pull down the menu, but cannot click anything on it. It acts as if I am clicking off them menu,