I'm used to start call with my friends and watch videos together while on the call, but when I tried to do this with the Galaxy A31 the YouTube sound was poor, with no bass and high middle frequencies. This only happens when I am in call on WhatsApp, I tested with the normal voice call from the SIM and it was all good.
And it's not just YouTube. Any sound that I play on my phone is weird when I'm in a call on WhatsApp. Netflix, Spotify, all sounds are weird.