I´m using an app locker app called App Lock (genius name, right? ^_^) on my Android phone,
it works perfectly with all my other apps I want to keep locked (for peace of mind, in case my phone gets lost or stolen), but not with the Fiverr App, so I guess it must be the Fiverr App, where the problem is.
If anyone has/had the problem, and maybe found a way around it, please share? 