Great app, but has stopped working recently – Sleep++ Review

Great app, however has not worked properly since 10 Apr 2018. Automatic tracking states that I slept for 24 hours (I wish). Manual tracking is no longer saving the data to the phone. Not sure if the two recent updates are out of wack. Currently using iOS 11.3 on my iPhone 6s plus and iWatch Series 1 version 4.3.
Review by MsMeLisa5 on Sleep++.