Due to this being an issue with the launcher itself and not the editor, it would be best if we moved this issue over to a report on http://help.epicgames.com/
Please use the “Email Us” button to create a report and use the “Launcher Support” issue type. This will make the report go straight to the team that oversees the launcher who should be able to help you more with this issue.
Edit: Posted just after your last message, so you can ignore this. Thank you narrowing the reproduction down. I’ll try to get the same thing to occur locally.