We have seen this behaviour before.
The problem appears to be related to the graphics driver used.
The workaround is to add '--disable-gpu' in the Hipchat startup command
We have a suggestion open to improve this behaviour at
I encourage you to vote and comment on the suggestion to increase it's visibility.
...have mention name FirstnameLastname. Fe.: @MaartenCautreels This certainly helps to know who is being mentioned in a conversation. Imagine your colleague sends the following message...
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