Hi;
I’m no computer whiz, but I think it staying logged in requires, "cookies" to be retained.
My browser is set to clear my history every time I close it, (including when it goes into, "sleep" mode).
Before I set it to automatically clear the history, I would still be logged in after I left the site and came back.
Might check those settings, ("clear cookies", or, "clear browser history") and see if there’s a box to check, (or uncheck).
Hope that helps.
Happy motoring!
Alan