It happened again, and it quickly restored after 5 mins.
I tryed this coinbase address on mining pc with Chrome / Edge few times.

I get one line json always, just with btc price!?

Got this with Chrome:
at 00:13h
{"data":{"base":"BTC","currency":"ILS","amount":"15098.09"}}
at 00:15h
{"data":{"base":"BTC","currency":"ILS","amount":"15113.67"}}
at 00:18h
{"data":{"base":"BTC","currency":"ILS","amount":"15107.02"}}
at 00:20h
{"data":{"base":"BTC","currency":"USD","amount":"4300.00"}}

And with Edge:
at 00:21h
{"data":{"base":"BTC","currency":"USD","amount":"4301.45"},"warnings":[{"id":"missing_version","message":"Please supply API version (YYYY-MM-DD) as CB-VERSION header","url":"https://developers.coinbase.com/api#versioning"}]}

Times are CET.
OS is Win10 Enterprise Evaluation. I recently updated Awe to v4.0. Before I didn't noticed this.
As I don't have Firefox on mining PC, I tried in Firefox on different pc in totally different lan and provider, and I get the same one line reply like Edge/mining pc.