Bad cast in editor utility widget when casting to Movie Scene Property Track

When reloading utility widgets the Movie Scene Property Track seems to be unrecognized causing cast nodes to become invalid.

1. Create an editor utility widget
2. In the widget's graph add a Get Selected Tracks node
3. Iterate over the results with a for each loop
4. In the loop body cast the elements to a Movie Scene Property Track
5. Compile, save and close the editor
6. Relaunch the editor and open the widget's graph again

RESULT

The cast will now be a bad cast node due to an invalid target type.