UPDATE 10/22/2018 - This issue should now be corrected as of update 9.30. Please note, this repair only affects new Mobile Creator stories created after update 9.30, previously created stories will continue to experience this issue and will need to be remade as a new story. We apologize for this inconvenience.
This is currently a known issue with Mobile Creator. The team is actively looking into this issue, but don't yet have an estimate as to when a fix will be available.
For the time being, we suggest editing your story using Writer's Portal.
For writing tips and instructions we have a Writer's Guide on our Writer's Portal that can answer almost anything you might need help with when you are just starting out.
You can find the guide here: