Unable to traverse records after delete record in form view

• Go to a O2M. For example, template.product_suppliers.
• Create 3 records.
• Switch to form view on some record.
• Delete the record.
• The next and back buttons are disabled, so you can't go to the other 2 records while you are the form view.

Only solution is to switch again, go to some of the others 2 records and switch to form again.

I think this comes from #12664 (closed).

Detected on gtk, not tested in sao.