Logins Not Saved, Even Though Option to Delete Cookies and Site Data When Librewolf Closes is Disabled

UPDATE: Issue is not tied to the browser but to the specific sites. Some sites, like Proton, will require you to enter a 2FA code every time you login, even if the option to remember your sign in was selected at the login page.

ORIGINAL I'm currently running EndeavourOS, and I have Librewolf Version 120.0.1-1 installed. This is the latest version from AUR at the time of posting. I've noticed that some websites I visit frequently are not remembering my logins. Thus far, that includes one of the banking websites I use, Proton Mail, and Piped. Other websites appear to be remembering the logins after Librewolf closes.

I checked the Privacy & Security settings, and I confirm that the option listed in the title is not enabled. I also confirm that cookies are being stored for the sites I frequently visit.

Is anybody else experiencing this?