diff --git a/libs/ardour/io.cc b/libs/ardour/io.cc
index 89af474b45..ad7e21187d 100644
--- a/libs/ardour/io.cc
+++ b/libs/ardour/io.cc
@@ -1141,6 +1141,7 @@ IO::set_name (const string& requested_name)
 
 	for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
 		string current_name = i->name();
+		assert (current_name.find (_name) != std::string::npos);
 		current_name.replace (current_name.find (_name), _name.val().length(), name);
 		i->set_name (current_name);
 	}
diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index a30b460208..488ae0f4db 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -3167,7 +3167,6 @@ Route::set_processor_state (const XMLNode& node, int version)
 				_triggerbox->set_owner (this);
 			}
 			_triggerbox->set_state (**niter, version);
-			_triggerbox->update_sidechain_name ();
 
 			new_order.push_back (_triggerbox);
 		} else {
diff --git a/libs/ardour/triggerbox.cc b/libs/ardour/triggerbox.cc
index 025f6f8013..e363412ebf 100644
--- a/libs/ardour/triggerbox.cc
+++ b/libs/ardour/triggerbox.cc
@@ -3223,7 +3223,11 @@ TriggerBox::set_state (const XMLNode& node, int version)
 	if (scnode) {
 		add_midi_sidechain ();
 		assert (_sidechain);
-		_sidechain->set_state (*scnode, version);
+		if (!regenerate_xml_or_string_ids ()) {
+			_sidechain->set_state (*scnode, version);
+		} else {
+			update_sidechain_name ();
+		}
 	}
 
 	return 0;