&gt; until the client began freezing, chewing 100% CPU for as long as I patiently left it running, and not getting itself sorted out.<p>The same happens for me on iOS and OS X quite often. I disabled mobile data and push notifcations on iOS as it sucked up tonnes of data (I&#x27;ve seen 30MB&#x2F;day even when I haven&#x27;t opened the app), and repeated or delayed notifications. Whenever I open a conversation I have to leave it 30s - 1 minute until it updates with the latest messages.