Loopback not responding as expected

Hi,

I'm trying to get Loopback to work in MainStage 3.0.3 but it is just strange.

I onpen one of the template concerts, clear out everything and add just one audio channel for my mic. Then I insert the Loopback Plugin. When I hit record it starts recording just normal - I can see the waveform. When I hit it again it should play back and overdub but it just set the loop length an the waveform is empty. Record and play button are lit.

To record and overdub I have to hit record, then play when finished, then record again. But it stores the overdub only if I hit record once more after each take.

Did I mess with the configuration or is there a bug?

Im not using any layout buttons or MIDI controller, just the plugin's controlls. Anyway, it doesn't work with mapped layout buttons either.

Hope anyone can help.