fix: Measurement Tracking: Various UI and functionality improvements (#4481)

extensions/cornerstone/src/services/SyncGroupService/SyncGroupService.ts

@@ -148,6 +148,11 @@ export default class SyncGroupService {
       const { type, target = true, source = true, options = {}, id = type } = syncGroupObj;
 
       const synchronizer = this._getOrCreateSynchronizer(type, id, options);
+
+      if (!synchronizer) {
+        return;
+      }
+
       synchronizer.setOptions(viewportId, options);
 
       const viewportInfo = { viewportId, renderingEngineId };

extensions/cornerstone/src/services/ViewportService/CornerstoneViewportService.ts

@@ -763,9 +763,11 @@ class CornerstoneViewportService extends PubSubService implements IViewportServi
       });
     }
 
-    if (!volumesNotLoaded.length) {
-      return;
-    }
+    // It's crucial not to return here because the volume may be loaded,
+    // but the viewport also needs to set the volume.
+    // if (!volumesNotLoaded.length) {
+    //   return;
+    // }
 
     // This returns the async continuation only
     return this.setVolumesForViewport(viewport, volumeInputArray, presentations);