Fixed triggering mode change when acquiring

src/model.cpp

@@ -350,6 +350,9 @@ void ScopeModel::publish_event(double pre_s, double post_s, double edge) {
   snap->pre_s = snap->stamps.empty() ? 0.0 : -static_cast<double>(snap->stamps.front());
   snap->post_s = snap->stamps.empty() ? 0.0 : static_cast<double>(snap->stamps.back());
   event_.store(std::move(snap), std::memory_order_release);
+  // Bumped after the snapshot is in place, so a consumer that sees the new sequence
+  // number sees the snapshot it counts.
+  event_seq_.fetch_add(1, std::memory_order_release);
 }
 
 void BufferStore::set_epoch(f64 epoch) noexcept {