Logic Pro (X) Losing track stacks routing. help!


Imagine a keyboard Summing track stack with a couple of audio piano tracks, 2 software instrument pianos, organ, fender.

Some of the individual tracks have plugins and their own plugins and automation, and the summing track also has plugins and automation.

I this kosher?

I ask because I am finding that audio on tracks sent to the summing bus is suddenly not showing on the summing track meter, and changes to plugins and automation on the summing track are ignored. Its as if the summing track didn't exist.

OK. so the piano track is playing audibly, the track meter is showing activity, the summing track is showing none.

dig this: muting the summing track doesn't stop the sound!

Yet the track is still sending to the summing track bus NOT to output 1 and 2.

This feels like a bug - can anyone confirm sighting of same?