Nothing in logs, but I found that reloading admin page with option multiple times, sometimes shows the checkmark in the box, sometimes checkmark is missing.
Seems I found the issue, the record in database was duplicate
id | name | data_type | value | created_at | updated_at
----+---------------------------------+-----------+-------+----------------------------+----------------------------
46 | download_remote_images_to_local | 5 | t | 2018-05-28 21:27:26.542915 | 2018-06-05 10:40:51.894279
47 | download_remote_images_to_local | 5 | f | 2018-05-28 21:27:26.543519 | 2018-06-05 10:40:49.163287
(2 rows)
Removed both records, reapplied option from admin panel, new proper record applied.