App view/screen freeze after unlock

In connection with your other issue … If nothing else comes up here soon, consider backing up your important data, then boot the phone in safe mode or do a factory reset.
Tutorials for all of this are here …

https://support.fairphone.com/hc/en-us/categories/360002044272

If this doesn’t help, contact support.

https://support.fairphone.com/hc/en-us