Flow sometimes plays already saved songs with "I want more discoveries" turned on

Around in December I have noticed that Flow gave already saved songs on every 2nd-3rd song despite using the “more discoveries” option. For context I was always on the discovery preferring option before these multiple months and I didn’t notice playing familiar songs back then, or definitely not as much as it does currently.

My listening style:

• Liked songs are saved into one or more of playlists, which are separated by genres / vibes
• I barely favorite / heart songs, that category goes for the “top 10% quality’ songs for me basically

Do I need to change my favoriting style in order to fix Flow?