[therein]

There is definitely that. There is also some sort of strange bug with Chromium based browsers where you can get a tab to entirely fail making a certain connection. It will not even realize it is not connecting properly. That tab will be broken for that website until you close that tab and open a new one to navigate to that page.

If you close that tab and bring it back with command+shift+t, it still will fail to make that connection.

I noticed sometimes it responds to Close Idle Sockets and Flush Socket Pools in chrome://net-internals/#sockets.

I believe this regression came with Chrome 40 which brought H2 support. I know Chrome 38 never had this issue.