HipChat doesn't currently have a preference to scroll to the beginning of unread history. It's certainly something we've considered adding though. If you want to file it as an official suggestion, you can go to https://support.atlassian.com/hipchat/ and that will allow other users to vote/watch/comment on it (and helps us track interest in such a feature).
...from the beginning. We have built up a lot of content in HipChat, with it being a core tool in our distributed company model. While it is true that we didn’t need to move to Slack immediately, we felt it...
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