I'm trying to enable streaming via the REST API but it doesn't seem to be working.

curl -H "Accept: text/event-stream" "https://horizon-testnet.stellar.org/payments"

This curl statement only returns a list of payments but it doesn't stream any.

Even the stellar tools explorer isn't working when put in stream mode...

https://www.stellar.org/laboratory/#explorer?resource=operations&endpoint=all&values=eyJzdHJlYW1pbmciOnRydWUsIm9yZGVyIjoiZGVzYyIsImxpbWl0IjoiMTAwIn0%3D&network=public

Am I doing something wrong here?