dave_3d Hi
Can you provide your site link and admin details for the respective site in edit fields in order to have closer look
For reference, You can follow thread post (5 point) procedure.
Update : I think this appears to be apparent issue after updating to J 3.8.7. Will inform our dev. team about the same and revert back as I get update on the same.Thank for letting us know for the same 🙂