Flowdock - Unable to start 1-1 conversation

Document ID : KB000125269
Last Modified Date : 25/01/2019
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When trying to start a private conversation (1-1) in Flowdock (Web Based or Full Application), it will keep trying to load the existing chat however it never loads. 
Closing the 1-1 chat with X button and adding it back OR restarting PC/MAC seem to resolve the issue.