Sonar freezes for ~1.5 seconds every time I stop playback

[moonbooter]

Hi,

I have a problem and hope you can help me: Every time I start playback in Sonar (current version in subscription) and then stop it, Sonar freezes for ~1.5 seconds. Only then does the timer jump back and I can continue working. This is incredibly annoying. 
I've checked all the settings and can't find any “errors.” 
Does anyone have any idea what might be causing this?
Thanks and best regards

[Bass Guitar]

When that happens the first thing I do is toggle the global bypass all effects. 
 

Another thing that happens is that windows update is running. 
Try airplane mode. 

[moonbooter]

Thanks. But that's not the reason.