Teracube 2e - I can no longer hear anything on voice calls

I bought the Teracube 2e from Murena. For the last few days (at least) I have not been able to hear anything when on a voice call.

Regain your privacy! Adopt /e/ the unGoogled mobile OS and online servicesphone

Hmm if I turn on speaker I can hear them.

Sounds like my issue:

“Have you tried turning it off and on again?”

sorry but no really - I suffered from a mute mic during calls, not recording when plainly testing - and a reboot reset volume levels (I guess) to make it work again.
Your workaround putting the call on speaker helps before a reboot.

Maybe this is induced by plugging headphones in and out or some component crash, couldn’t provoke the conditions yet.

This was on a Moto Harpia though in /e/ 1.2.