Issues when Pulselocker is activated

I use a mac book pro (Retina, 13’, late 2014) with 2,8 GHz intel core i5, 16 GB 1600 MHz DDR3 ram and Intel Iris 1536 MB graphics. macOS Sierra  version: 10.12.4, rekordbox version: 4.3.0.0020

 

I’ve massive problems with rekordbox when pulselocker is active.

 

When I logged in to pulselocker in rekordbox with active wlan on my computer, I noticed, that rekordbox runs very slowly and stuttering at this time.

 

At that point, it’s not more possible to use pulselocker. When I want to store tracks offline at my mac book pro or scroll down in my pulselocker playlists it slows down and I see only that spinning ball on my mac that tells me that my mac book pro is very busy.

 

From time to time it seems to run normal again but then it slows down again and I see again the spinning ball on my mac book pro and nothing else happens. (freeze)

 

This is not acceptable! So I can’t work with this app!