This Android only issue happens when the editor is used in the wp-android app, and reporting it here the link to the original issue to be sure we're not miss it. wordpress-mobile/WordPress-Android#8838

Recap:
If you add a picture to a new post, and then tap on it an IllegalViewOperationException error is triggered. Stack trace reported below. After that the UI doesn't give you the ability of getting out of the post with the Back button. You need to use the menu and publish or save as draft the post.