In one workflow process diagram, grid lines are appearing both in the embedded version and in the Lucid web app for a coworker. When I access the diagram, I see grid lines in the embedded version but not in the Lucid web app. My expectation is that grid lines should not appear for any users in either view.
Other diagrams behave as expected, with no grid lines showing in either the embedded view or the web app. Why is this particular diagram behaving differently?
Grid Lines appear in embedded version for both myself and co-worker

Grid lines DO NOT appear for me in lucid web app but appear for co-worker

