I am experiencing the App crashing when trying to add a comment. Also, the App: Comments has been deleted and does not come back.
What’s your color theme for your app? Can you try some others? I’m thinking it might not be crashing, but actually showing the screen that asks for your Name for comments (based on the Continue Button at the bottom of the screen. You could try clicking on the screen approximately where the name field is and type to see if it works.