Subscriptions with $client query parameters are not reactive

[tjramage]

Steps to reproduce

const setStore = data => {
    // set card store logic...
}

this.service.find({ query: { cardType: 'story', $client: { teamId: '12345' } } }).subscribe(setStore)

Expected behaviour

setStore() is called with result of initial find query, and should also be called upon subsequent changes to any documents associated with the query.

Actual behaviour

setCardStore() is first called with correct data, but subsequent calls result in an empty data array (rather than all relevant documents)

System configuration

Setup using a RethinkDb database.