duplicate users returned in search when creating new chat

Today I noticed an obscure issue when I was searching for users to create a new chat. I added a few people and then was having issues finding the next user I was looking for. So I searched for a keybase username, got the results, then cleared the search bar & typed in the keybase username again only to be presented with the same user twice. I tried to reproduce again and sure enough got the same user returned 3 times ... then 4 ... and so on. See attached (censored to not reveal usernames).

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Reproduce the issue in the new-chat user search by searching for a Keybase username, clearing the search, and repeating the search several times. Trace the chat user-search entry point and determine why prior results are retained or duplicated. Done means repeated searches show each matching user only once.

Written by the indexing model from the issue text.