Raise to listen WhatsApp not working on IOS 15

Hello! I have a question.

Last week I was listening to some WhatsApp voice messages and, out of the blue, I could hear them on my ear. They play perfectly on speaker.

I try listening to voice messages from iMessage and I don’t have this issue.

I’ve also tried restarting my phone and eliminating the app and reinstalling it. Didn’t work.

Funny thing, yesterday I received an IG voice message and same thing happened.

What happens is that it starts playing the voice message but when I raise it it stops and the no sound symbol appears…

if any knows how to fix it, I would really appreciate it!

Thanks