Corrupted my iPhone – The Grid - Calendar Review

I have been using your calendar for over a year, starting on an iPhone 6. I began having problems with my phone not giving audible alerts to calls, texts, etc. I took it to the Apple store and they ran a diagnostic, said it was fine and reset my phone. Problem recurred. In February 2018 I purchased an iPhone 7, downloaded apps from the cloud, and the same problem occurred. Three weeks ago I took the iPhone 7 back to the Apple store, they ran a diagnostic, phone is fine, and reset it. This time I downloaded apps one at a time. I downloaded The Grid and the problem has recurred, periodically I do not get audible alerts or sound effects, then they will come back. It appears your app has a bug that is adversely affecting my phone.
Review by letmesubmitaonestarreview on The Grid - Calendar.