Hi,
I get an email for each new post. I then flick through them and open the ones I want to read in full. This opens a new tab for each new post. I have login each time. Shouldn’t Discourse keep me logged in? I’m using Safari 12 with 2FA turned on.
Best wishes
Michael
Maybe you turned off cookies?
If I have no tabs or window open to the forum and open a new one, go to the forum I am logged in. It seems to only happen when I jump from the email application.
This got me thinking. What is the difference? I then realised my email gateway rewrites the link so that when I open it is rescanned to check it isn’t malicious. The browser is then redirected to the correct link. If I copy and paste that link to a new tab, I am logged in. It seems it is the re-write that is the issue.
I can’t complain as I set up the mail gateway 
