Steps to reproduce:
- Add a Campaign
- Click to view the Campaign > Click the Reports tab
- Click + to add a Custom Report
- Drag two fields to the form builder
- Drag and drop them within the form builder
If the field panel is expanded, it will remain expanded (or close) after dragging it. Likewise, if the field panel is collapsed, it will remain collapsed after dragging the field.
If the field panel is expanded, it closes after dropping it; if the field is collapsed, it opens after dropping it. See attached gif.