I have observed that if I modify the sync function such that more existing documents are now included in an existing channel, and then execute a _resync, then existing clients with an existing pull replication on this channel will not pull replicate the new docs now included in the channel.
If I make a change to one of the docs then the new revision is replicated down to the client.
Starting replication on this channel from a new client will include all the new docs in the channel.
This feels like a bug to me. Is it, or is my understanding of expected behaviour incorrect?