Nokia 7 plus sound recording sensitivity and quality

I have recently switched to a Nokia 7 plus from my earlier OnePlus 2, and noticed that I now have way more recordings (and snore marks) and that the sound quality is much worse (it’s quite muffled, or simply low frequency rate) than before. Listening to the recordings, it seems I’m just breathing a little loud and wouldn’t necessarily call it snoring most of the time.

Anyone else has a similar issue with this (or a similar) Nokia phone? My settings used to be 20%, gain, high quality; now it’s 50%, no gain, high quality — and it’s no better really.