Rekordbox 5 - Performance feedback

Hi Pioneer, 

Running Rekordbox 5 , I have noticed the following

There is a lot of lag in the performance of it – 

*  This can be visible immediately after start up or mid-way through mixing, overall sluggishness in navigating around
* The first signs of this are the waveform on second deck where it begins to lag and slow down noticeably , audio is not impacted
* Hanging/stuttering when dragging a track onto a deck – you have to move the mouse really slowly to drag the track onto a deck
* When using the effect dial on echo and then changing to another track on the same deck and using the effect dial again on echo it holds onto the previous tracks audio e.g. using echo is not using the current track but a faint version of the previous track
* Jogging of wheel does not reflect real time on the deck – you can see the cue mark being a few seconds behind particularly if spinning jog wheel backwards 
*  A lot of the issues seem to be more visible on the right deck.
* Shutting down Rekordbox and re-starting seems to resolve the performance problem but not always. It something I am having to do more often than not.

This is running Rekordbox on a high spec PC , with nothing else runnning in the background other than anti-virus software. In Rekordbox 4, I could have several apps running at the same time with no impact to performance.

Specs are : A DDJ-RB controller running Windows 10 on a Dell XPS 8700 Intel Core i7-4770 CPU @ 3.40GHz  with 16GB of RAM

Cheers