Android screen blackout during phone ring and call

Hello,

I was calling through my Android phone standard phone application (having enabled the speaker) while I joined a Jitsi Meet room. As soon as I entered the room, the screen suddenly turned off. The phone call was still active, though the speaker has been disabled.

Since that moment, every time I receive or dial a standard phone call, the screen switches off. I cannot switch it on back (even using the power button!) until the phone call ends. From the very first ring to the end of the call or ring.

I uninstalled Jitsi Meet but the problem didn’t disappeared.

It’s quite annoying because I cannot reply a phone call (I cannot slide up the green icon!), and if I call a voicemail, I have to wait until its timeout!

Do you have any idea what’s going on?

Android 9 (LineageOS 16.0)
Jitsi Meet 20.1.0 (through F-Droid 1.7.1)

PS: I don’t know if it’s related, but since then, I cannot unlock the phone through the fingerprint sensor. I have first to switch it on, then the fingerprint works.

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