ArcGIS Pro 2.6.6 crashes intermittently when editing Utility Network Services within the attribute table.

Additional Information

Workaround

1. When editing in ArcGIS Pro 2.6.6, keep the attribute table closed.
2. Select the two features. 
3. Navigate to Edit > Attributes.
4. In the Attributes pane, right-click the feature containing the desired attributes, and select Copy Attributes.
5. Right-click the feature which requires the attribution, select Paste Attributes.
6. Click Apply. Delete and modify association as required.

Note: A field map in the editor settings is able to control what fields are copied in the workflow above.

Steps to Reproduce