Some Keyboard Shortcuts No Longer Work.

Hello. This question concerns the Windows 11 desktop version of Firefox. I have long used the '''Home''' and '''End''' keys on my extended keyboard to scroll to the very top of any given page in Firefox (Home) or to the very bottom of that page (End). But, lately, I notice that, for no reason I can figure out, Firefox no longer responds to those shortcuts. Now, when I tap Home or End, the page may, at first, scroll up or down slightly but not to the top or bottom. If I press Home or End again, nothing happens at all. Sometimes, if I press '''Ctrl + Home''' simultaneously or '''Ctrl + End''' the page will scroll to the top or bottom respectively. Why has Firefox's behavior apparently changed? Is there an issue with my keyboard or operating system settings? (I use a Logitech G915 keyboard.) Please let me know how to restore Firefox's shortcut functionality, where I can tap just '''Home''' to scroll to the top of a page or only '''End''' to scroll to the bottom of a page. Thanks and be well.