Rekordbox 6 bug : Display Playlists Quicker option has no effect

The waveforms and cue points take some time to display. I observed this phenomenon on several computers including a Core I3 3xxx and a Core I7 6700HQ. Fellow DJs observed the slow display.

After some investigation, I could conclude that the phenomenon is similar to RB5's when you disable the "Display Playlists Quicker" option in Settings/Advanced/Browse/Display Speed.

Could you please investigate ?