This is only "kind of" Threads-related, in that it has to do with staying logged-in to my Threads site. It has me baffled.
Occasionally when someone posts a link, or someone includes their "home page" in their profile, when I click it then return to Threads, I find myself logged-out of Threads.
Sometimes it DOESN'T happen though!
It has also happened when I've been logged-in HERE at Threadsdev.com, so it's not specific to my installation.
What could cause that to happen, especially when it's only "sometimes"?! It is HUGELY annoying and hugely weird.