involves:user1 AND involves:user2 broken

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Bug

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attempting to search for issues that involve me AND a different user does not work
involves:redcmd AND involves:jeff-hykin

Expected:
all issues that involve me AND another user are returned
example microsoft/vscode-textmate#193

Actual:
nothing

involves:user1 involves:user2 lists all user1 issues even if user2 is not involved