[Leo]

Thanks Mike, for keeping me optimistic hi.
From my point of view a root cause might be the new firmware 2.2.1 
There is no way to roll back 2.2.1 to earlier version, thus my options are mostly gone.

So if you find some time these days to update your CME WIDI Master, we will see the possible influence on sending Midi data from Mobilesheets.
But - as my Android setup behaves the same as the iPad (ok, MacBook might be different) installation. that would imply a common library in both of your apps based on the same or similar code having an issue with the new 2.2.1 firmware.

I could install Mobilesheets as well on my Acer Spin Notebook. But that's difficult, as I don't have a payment assigned to MS store and the Spin runs WIN11 already. Acer does not ship WIN11 drivers for my Notebook and audio and power-management drivers are not compatible and cause problems in day to day operations.

What do you mean by "two-way communication"? Is this a special set-up somewhere?

I'll stay tuned!