It is not possible to scroll the playlist list in the sidebar using wheel nor touchpad gesture. It scrolls by few pixels, then it forcibly goes back to initial place. Zooming/scaling the window won't help. It randomly goes away after navigating to other album/artist/playlist. Scrolling works by using handle through. Video attached (MOV inside the ZIP file).
Steps to reproduce the issue:
MacBook Pro mid 2015, macOS Mojave 10.14.6.