Hans ,
i think i found what`s happened .
It`s not double up the CPU but the indicator turns Negative . The red filling is the Free timing . When i move the mouse , down indicator is "emptying" like it should "filling" and when i stop moving it "fiils" to where it must be empty . Strange .
Look at the picture before - the empty space is nearly exactly to the filled (red) one above.
I think this is happened after certain times of reconnecting/restarting the stream.
If it is not like this, there is one more thing - In the time of "high" CPU load , the output buffer is unstable and "half" filled. If everything is OK , the output buffer is Full filled of blue.I`m talking about FM output buffer.
Also when this happened the Input soundcard in this time is "grayed out"

and synchro is going to other parameters . Normally they are 2.000 to 1.000 , but when this error appears they are like normal playing 1.002 to 1.000
Hope that help if you can check it.