Server-side consumer.observer.on(“pause”, fn()) will only be fired when you call consumer.pause() or corresponding server-side producer is paused. If you pause client-side producer, it will just stop sending media, there will be no event on the server (but score will go down to 0 after a bit) or on client-side consumer.
Client-side consumer.observer.on(“pause”, fn()) is only really fired when you call consumer.pause(), so documentation there could be improved indeed.
Also you have full access to source code, just go to Consumer.ts and see what can trigger pause event yourself.
If you pause client-side producer and want to know about this on the other client, you need to send this information somehow through signaling layer.