periodic http authorization on hibernated tabs

Kind of a weird bug - 

Basically, periodically, sidewise attempts to authorize http sessions with hibernated tabs - 

As I work with an enormous amount of equipment, this occasionally results in several hundred routers, none of which I am interested in dealing with at the moment, simultaneously spamming me with authorization requests.

I suspect that this may be connected to Chrome losing internet connectivity, but I have not confirmed this.

It's also important to note that the HTTP auth attempts come up as a sub-focused window of the sidewise tab, not of the main chrome screen - not sure if that helps track it down or not.