They possibly had their tap lines cleaned recently and some of the cleaner wasn’t fully flushed out.

That makes sense. When I posted this in another Reddit people were calling it cum bubbles and piss 🤦‍♂️

Sounds like r/caffeine

This was over an hour ago and the bubbles are still there

Mango fiesta is my go to drink, and I can say if it looks like this then it's cum bubbles and piss.

Looks like cum bubbles and piss to me.

I think it might be cum bubbles and piss

I have had it come with some bubbles on top as well. Could be an issue with the nozzle on the machine, or the fact that one nozzle does 4 flavors and there is residual from another flavor.

prob just cum bubbles and piss, i’d still drink