Quantize CDJ2000 nexus

I am the happy owner of two brand new CDJ2000 nexus players. Last weekend I had two gigs, they were really amazing! 

But.. By default the Quantize is set to 'on', which is great. I discovered that sometimes this causes some problems, using the cue and play button together. Since the 1000 MK3 it's possible to start a song by pressing the CUE button, and then the play button afterwards. The player continues playing the song. The 2000 nexus sometimes hicks up for a while when doing this. If you deactivate quantize, there is no problem.

By the way, I use rekordbox via LAN with a Netgear switch between it. (Rekordbox 2.0.1(got it from an update and selected 'update missing data'  afterwards)).

One other point. The (new) beatgrid is not shown on the display for every track, sometimes the beatgrid is blank.

Does anybody have the same problems? Or do I need to install a new clean version of Rekordbox and import the music again?