App Consistently Dies Not Allow "Restore Purchases" on iPhone – Down East Magazine Review

This is the best magazine that I do look forward to reading on my mobile devices. However, I cannot get the app to restore past purchases on my iPhone 7plus. (I have a digital subscription that just auto-renewed for another year and the app works beautifully on my iPad.) PLEASE fix this issue so that I can read the magazine on my iPhone. (My low rating is due entirely to this problem and In no way to the caliber of the magazine.)
Review by iPhone Devotee on Down East Magazine.