On iOS, I can open the chat the first time it works as expected, then the second time it will hang for a long time on "starting chat" and eventually fail with "error starting chat".
Then I can open the chat again and it works, then it doesn't, etc.
I fixed this problem by updating from iOS SDK 1.6.4 to iOS SDK 2.2.0 (latest at the time of writing).
On iOS, I can open the chat the first time it works as expected, then the second time it will hang for a long time on "starting chat" and eventually fail with "error starting chat".
Then I can open the chat again and it works, then it doesn't, etc.
I fixed this problem by updating from iOS SDK 1.6.4 to iOS SDK 2.2.0 (latest at the time of writing).