What could cause `UserManager` to return the wrong user?
问题 Something rather scary is happening on my ASP.NET Core 2.1.0 MVC site. While I was browsing, all of a sudden it shows I am logged in as a different user (who also happens to be browsing the site at that time). I can't pinpoint whether there is a specific use case that triggers this, but this has happened twice now. Navigating to other pages still shows I am logged in as the other user. It even seems I take over the claims of the user I am incorrectly logged in as. My question is: what could