QueryPublisher unsubscribes after one event

Is there an existing issue?

• I have searched existing issues

Build info

• ObjectBox version: 4.0.0

Steps to reproduce

let query: Query<Person> = ......
query.publisher
                    .replaceError(with: [])
                    /*.assign(to: \.persons, on: viewModel)*/
                    .sink(receiveValue: { persons in
                        viewModel.persons = persons
                    })
                    .store(in: &cancellables)

Expected behavior

I expected that viewModel.persons will update continuously when I add / change a record that will match my query.

Actual behavior

After the initial query result is consumed by the Subscriber, QueryPublisher will unsubscribe because various Subscriber implementations like sink(), assign(to:) or onReceive() of a SwiftUI view will return Subscriber.Demand.none which causes QueryPublisher to signal completion to the Subscriber and shut down.

Start at the QueryPublisher entry point and reproduce the issue with the provided Combine sink example. Check how the subscriber's Demand.none is handled after the initial query result. Done means the publisher remains subscribed and viewModel.persons continues updating when matching records are added or changed.