Only they haven't started doing this right now. For many years, GitHub has been crippling unauthenticated browsing, doing it gradually to gauge the response. When unauthenticated, code search doesn't work at all and issue search stops working after like, 5 clicks at best.
This is egregious behavior because Microsoft hasn't been upfront about this while they were doing this. Many open source projects are probably unaware that their issue tracker has been walled off, creating headaches unbeknownst to them.
Just sign in, problem solved. It baffles me that a site can provide a useful service that costs money to run, and all you need to do to use it is create a free account -- and people still find that egregious.