Arpeggiator automation dysfuntion in loop mode

Hi there,

When I loop a midi clip and write an arpeggiator envelope in this clip (Arp source mix in this case), then after one loop the arpeggiator stops functioning as it should. Read is enabled, the knob is turning (autmatically of course) when starting playback from the beginning of the clip, the arpeggiator delivers, yet after one loop it does not generate its output anymore. When I disable read automation and turn the knob manually, while looping many times, it does function properly though. 

Does anyone knows if its my lack of knowledge of looping midi in sonar, or do we have a bug here?

Try it yourself, it is a fast test.

Best regards,

Robin