Hi Aliia,
I can report that this still occurs. Ours is an internal server, with a route into it for members, so hosting seems to prove irrelevant. As does number of users. What has that got to do with how the Url redirects after login?
The sidebar is showing up to guests on the join page. If I move a widget (like forum posts) over to the sidebar, those show up too.
If I make the join page hidden, and have the landing page as 'sign-up' I wish, after the sign-in, for users to get redirected to the front page. Currently, it goes to a blank white screen and a refresh is necessary. (perhaps resending login data?)
If I have the Join Page as landing, then user clicks 'sign-in', does the authentication and the system redirects as it should.
I have viewable to guests, switched off.
Please can you ask a dev? Or suggest a workflow for not having any content available to guests, until after sign-in?
I have tested disabling all plugins and switching themes to confirm its a core problem.
Cheers,
Matt