Disconnect the correct connection point proxy

CHANGELOG.md

@@ -28,6 +28,9 @@ Versioning](https://semver.org/spec/v2.0.0.html).
   plugin, causing the number of reported drag-and-drop formats to be magnitudes
   higher than yabridge's indicated maximum.
 - Fixed Wine version detection in the build configuration.
+- Fixed VST3 connection point proxies not being disconnected properly. This code
+  path is not being used for any of the current Linux VST3 hosts, so this did
+  not yet cause any issues.
 
 ### Packaging notes
 

src/wine-host/bridges/vst3.cpp

@@ -348,8 +348,7 @@ void Vst3Bridge::run() {
                 } else {
                     const tresult result =
                         this_instance.interfaces.connection_point->disconnect(
-                            object_instances.at(*request.other_instance_id)
-                                .connection_point_proxy);
+                            this_instance.connection_point_proxy);
                     this_instance.connection_point_proxy.reset();
 
                     return result;