This is a common complaint, but get the notifications right Atlassian. Users will receive lock screen push notifications for messages, but when you act on it you do not see what room or individual messaged you.
This is beyond frustrating for large organizations and teams. This is a long running issue and I rarely leave App Store reviews but this is absurd. Slack gets it right, so can HipChat. Please work on this.
YaBroPhil about HipChat – Group chat for teams