Raise to listen function on Facebook Messenger stopped working

The title pretty much says it but the raise to listen stopped working for voice messages in facebook messenger. I was able to listen a voice message only through the earphone speaker if I raised my iphone 12 on my ear but lately that doesnt seem to work. Whenever i m trying to do it, the voice message continues to play through both speakers and the screen won t even turn temporarily off like when you are on a call for example and you put the phone on your ear. I m not sure if it is messenger's fault or a setting that i ve missed. I reported it several times through the app but nothing has changed for about a month now.

Is there someone that can help?

Thank you in advance