iOS 11.3 - app freeze/sleep

Users with iOS 11.3 can’t use the app when device is locked for more than 10 minutes.

Event onResume not firing.

Steps to Reproduce:
Install Fitatu app.
Open app on any view.
Lock the device for more than 10 minutes.
After 10 minutes, unlock device.

Expected Results:
App wakes up and the UI is responding (e.g. user is able to click buttons)

Actual Results:
App wakes up and the UI is blocked (user is not able to click buttons)