Dedup ChatCore in addChatInList to prevent duplicates racing addChatToList
Dedup ChatCore in addChatInList to prevent duplicates racing addChatToList (cherry pick from quanta/master 0ddc9297c482864ae1a219508deeb25521dcdb96)
Dedup ChatCore in addChatInList to prevent duplicates racing addChatToList (cherry pick from quanta/master 0ddc9297c482864ae1a219508deeb25521dcdb96)