FP5 : random black screen / need hard reboot

• /e/ version: 1.16.1-t-20231026345875-stable-FP5
• Device model(s): FairPhone 5 - /e/ installed by murena
• Developer mode enabled: yes (was no at first bug detection)
• Device rooted: no
• Trackers blocker enabled: yes

Summary

Sometimes, the phone will go entirely black, power button won't respond, only way to revive the phone is to remove battery / power on OR KEEP button down ofr whats seems an eternity. (~ 30 seconds)

This happened randomly while in my pocket, with 4G Data enabled / Wifi disabled

This happened more quickly while using navigation app and moving.

Note that this did not happen at home on Wifi only, but as it's more or less random, can't say it's related or not.

The problem

Steps to reproduce

Most efficient way to reproduce :

• navigation app (magic earth)
• take a 30 minutes ride in a car 😄

Maybe any 'slightly intensive' application may reproduce the same behavior ?

What is the current behavior?

Black unresponsive screen.

What is the expected correct behavior?

A working phone :)

Workaround?

I wish I knew !

Possible fixes