Ok, it's my shitty cablemodem ISP.  Works fine when I use firefox via Socks5 proxy.  Probably fine from a VPN as well, but I don't have one to try.

I then launched, on the problematic cablemodem ISP connection:
$ chromium --enable-ssl-debugging 

Then looked at the 
chrome://net-export/
https://netlog-viewer.appspot.com/#events

And put a few of the relevant events into:

https://pastebin.com/ZuH4vxQW

Hell if I know how to decipher / troubleshoot that, but thought I would share.

I'll remember to try a different network the next time something like this occurs.

cryptocoin

I've tried both Chrome, and Firefox.  On Ubuntu Linux 20.04, if that matters any.

Chrome is Version 114.0.5735.106 (Official Build) snap (64-bit).

Firefox is v114.

I even just now tried Brave, same thing:
Version 1.52.129 Chromium: 114.0.5735.198 (Official Build) (64-bit)