On my Samsung phone running OneUI 6.1 the "now playing" song stays in the screen for fractions of a second (noticeably) before it disappears after I swipe away from the lock screen, I don't think that's fixable but adding an animation that smooths out the disappearance or makes it disappear by going up would make it look less janky at least
On my Samsung phone running OneUI 6.1 the "now playing" song stays in the screen for fractions of a second (noticeably) before it disappears after I swipe away from the lock screen, I don't think that's fixable but adding an animation that smooths out the disappearance or makes it disappear by going up would make it look less janky at least