changes from a peer never go back

1 files changed, 4 insertions, 0 deletions

diff --git a/src/swarm/sync.rs b/src/swarm/sync.rs
index 00ba1ad..07c990c 100644
--- a/src/swarm/sync.rs
+++ b/src/swarm/sync.rs
@@ -442,6 +442,10 @@ pub(crate) async fn handle_sync(
             }
             stats.heads_seen(heads_after.len());
             let changed = heads_after != heads_before;
+            if changed {
+                // They came from it: none goes back (`SyncSession::came_from_peer`).
+                peer_state.sync.came_from_peer(&replica.doc, &heads_before);
+            }
             if carried && !changed {
                 stats.nothing_new(payload_len, writer.is_some(), delivered);
             }