Issues when app is open in multiple tabs

[psrpinto]

When there are multiple tabs open, attempting to send a message does send the message, but does not render it in the timeline.

Messages sent to the room from other clients/tabs, do not appear in the timeline

[akirk]

Maybe this is helpful? element-hq/hydrogen-web#188
It could mean that it works as soon as we make the service worker work.