My pet peeve is when the app moves focus after rendering useful content. On Outlook 365, I'll start typing an email, and then as page load finishes(?) it moves

My pet peeve is when the app moves focus after rendering useful content. On Outlook 365, I'll start typing an email, and then as page load finishes(?) it moves my cursor off the email field and my keystrokes get interpreted as keyboard shortcuts. I've probably never accidentally deleted an email but who knows! MacOS on login will similarly let me start typing my password, and then decide it's actually done loading the screen and erase the password characters I've typed, and the prompt only gets the last 2/3 of my password.