Marking field value with mouse does not work after publish.

Steps:
1. Add Form block.
2. Add all 3 simple form fields.
3. Fill mandatory values.
4. Submit & Publish.
5. Return to edit mode.
6. Try to select / mark the value of Name for e.g. SingleLine.
Actual: The whole simple form field is being dragged.
Expected: Name value is selected.