B. Diddy thanks for the double check but it is this one : https://www.gsmarena.com/nokia_5_1_plus_(nokia_x5)-9246.php
Yes I'm going to uninstall things one by one and let you know.
It did happen again. I didn't change anything on my phone recently, just the media volume was muted for a long time, I started to notice it when i put back the volume, so may be the problem was here for quite a while.
It did played the sound when I booted in safe mode and landed on homescreen, but since I can't manage to trigger the sound again. but since its a little random i dont know if it is because of safe mode.