Using useQuery with pollInterval triggers onCompleted only once

Intended outcome:

I would expect the onCompleted callback to be fired after every poll.

Actual outcome:

onCompleted is being fired only once. First time the query is made.

How to reproduce the issue:

const { data, stopPolling } = useQuery(QUERY, {
  variables: {...},
  fetchPolicy: 'network-only',
  pollInterval: 1000,
  onCompleted: () => console.log('called')
})

Versions

npmPackages: @apollo/react-common: ^3.0.1 => 3.0.1 @apollo/react-hooks: ^3.0.1 => 3.0.1 apollo-cache-inmemory: ^1.3.5 => 1.3.11 apollo-client: ^2.6.4 => 2.6.4 apollo-link: ^1.2.3 => 1.2.4 apollo-link-context: ^1.0.10 => 1.0.10 apollo-link-error: ^1.1.1 => 1.1.2 apollo-link-http: ^1.5.5 => 1.5.7 apollo-link-logger: ^1.2.3 => 1.2.3 apollo-server-koa: ^2.1.0 => 2.2.4 apollo-utilities: ^1.3.2 => 1.3.2 react-apollo: ^2.2.4 => 2.3.2

[mamousavi]

Setting notifyOnNetworkStatusChange to true solved the issue in my case.

[andreasonny83]

Also, @dominik-myszkowski , setting fetchPolicy: 'network-only' only triggers the onCompleted once. I can only get it working by setting notifyOnNetworkStatusChange: true