LiveDisplay doesn't work on Fairphone 3

• /e/ version: 0.9-p-2020042851613-dev-FP3
• Device model: Fairphone FP3
• When it started to occur: right after installing /e/
• Reproducible with the last /e/ version: yes
• Reproducible with LineageOS: I don't know 🤔

Summary

I can't activate LiveDisplay.

The problem

Steps to reproduce

Click in the top menu on the LiveDisplay icon or go to the LiveDisplay settings and choose 'Night'.

What is the current behavior?

The LiveDisplay settings are undone.

What is the expected correct behavior?

LiveDisplay should be activated.

Technical informations

Relevant screenshots

I chose 'Night' in the popup menu:

But it isn't saved:

Clicking on the LiveDisplay icon has no effect: