Due to some recent cloud infrastructure changes, opening many Particle event streams from a browser can cause the browser to stall. Most browsers will only make 6 connections to the same host (
api.particle.io in this case) so having many event streams in 1 tab or having multiple tabs with 1 event stream open in each will make new connections to
api.particle.io stall indefinitely until other tabs are closed.
The Particle engineering team is working on an additional infrastructure change to allow more simultaneous event stream connections again.
Thanks for your patience as we develop and roll out this change.