Realm.asFlow() is not being triggered on Sync changes.

[cmelchior]

Looks like our Realm.asFlow() isn't being triggered when there is a remote change, whereas queries are being triggered correctly:

realm.asFlow().collect {
  // Is not being triggered when changes are coming from another device
  println("$it -> ${it.realm.version()}")
}
realm.query<FlexParentObject>().asFlow().collect {
  // Works if changes are coming from another device
  println("$it -> ${it.list.size}")
}

This test reproduces the issue: https://github.com/realm/realm-kotlin/pull/1071/files#diff-65ad5644786458a5a2bc5d99f679e8533faf91be5c5ec9aedf806cba336acaefR214

[rorbech]

Seems to be that we are only initializing the nofitier's internal LiveRealm when we are actually listening for something other that top level realm update. So the realm_add_realm_changed_callback is not registered before listening for something else. An immediate workaround until a fix is ready would be to just trigger some notification, ex.

async { realm.query<X>.asFlow().first {} }