Further investigation into this reveals that the lines only don't show on first going to the record. If a checkbox or radio button is tapped (to check it), the lines on all fields show. So, it's not a serious user issue, more of an inconvenience and poor user interface. Testing with FM Go 12 however shows it not to be a problem. All checkbox and radio button lines show immediately. But, a little off topic for this thread but perhaps related in the root cause, is that in FM Go 12 a display I have of stacked container fields, all related through different checkbox fields, is blank until you click a checkbox. (It's a Tessier Cleft face diagram where the surgeon clicks the checkbox where the patient's cleft is and the line shows on the face diagram.) This display shows immediately in FM Go 11. The common factor in both FM Go 11 and Go 12 issues is that the fields are related. Perhaps FM Go, generally, has a refresh issue with related fields.