I use Strawberry 1.2.11 with JACK and configured with QJackCTL fixed connections, not only for Strawberry, I use many more Audio Software Recording and Playing.

I set up Strawberry and JACK with pattern matching:

This works well with Start and Stop buttons of Strawberry.

But if I use next track and previous track the connection to JACK is lost. A single click on next track results in these.

If I click again on next track the connection is alive:

If I double click on next track the connection isn't broken.

As you can see, the number of out_pipeline is count up one and two with a double click. This should no problem, because I use the pattern matching in JACK.

Exactly the same behaviour exists for the previous track button. There is no problem, if I stop first, click then on next track and start again.

What could be causing this behaviour?

Tom