It’s inconsistent but across all threads. Except when it does feel like loading responses, every time it momentarily shows all responses before replacing all responses with the last response n-times.
I’m operating on the theory that it’s related to the DDoS.
(Latest production Chrome on latest production Mac OS X. On my phone right now so I can’t get exact version numbers but it does the same stuff on my phone which runs stock Android Lollipop with latest Moto X 2nd gen available updates and Chrome 51.0.2704.81. Same behavior on wifi as LTE.)