It looks like Facebook rolled out this update letting you know that your friends are also watching/listening to the same live stream. Which means your friends can also see that you are watching the same streaming. I believe this is privacy sensitive information and it shouldn’t be turned on by default.
Though this is supposed to be private unless you interact with the streaming (for example react or share), just opening the streaming link informs your friends that you’re on the same thing.
The other problem is that I don’t seem to find the setting to turn off this ‘feature’. And I don’t understand why Facebook turns this kind of privacy sensitive options on by default.
Let me know if you find the location to turn off this stupid feature.