Parent Task can be completed
The parent task on Android app can be completed (marked as complete). I suggest that this is disabled in case I put * (i.e., a parent task with no checkbox).
If I want all sub tasks to be completed upon marking the parent task as completed then I'd remove the asterisk from the parent one.
Thank you for your report. We're aware of this issue and we will disable the option to complete task headers (tasks with an asterisk in front of their names) in future updates.