That's very strange. Have you been able to open an issue with Atlassian Support? The messages are sending but your own client isn't seeing them received...
Usually most users can fix this issue by fully closing the HipChat client and then reopening it. This fix doesn't work for you?
Earlier this year we made the difficult decision to discontinue our team messaging tools, Stride and Hipchat. The end of life date for Stride and Hipchat Cloud is quickly approaching - February 15, 2...
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