And possibly
@WGroleau I suspect that your issues are related to your Cookie settings.
These days when we first access a European and many other websites we get asked to Accept Cookie settings or we can choose to have difference classes of Cookies accepted or rejected. There is often a Cookie class called "Functional" Cookies. If you turned this off when you first accessed the Forum then that may well be related to your sign-on issues.
@wanda others have already mentioned that if you dont want two-factor authentication then you can turn if off. I prefer to keep it turned on. That your situation is not remembering to keep you authenticated is, as I said probably related to your Cookies because that is how the Forum software remembers you. The other alternative, also Cookie related, is that you have a setting in your browser that is automatically clearing your cookies when you sign off from the forum.