Thanks steve, I guess this setting caused the problem. I´m not 100% sure, because after opening this project again to check the filter settings, it looked like this:
Very low settings, which probably were different when working on that project the last time, because notes up to F#4 were displayed.
I never used those filter settings, didn´t even know, they were there.
What is the purpose of those settings?
Why are they clicked active by default? Should be deactivated by default, IMHO.
Are there default values? Depending on what?
When will we be able to store user settings?
To hide notes out of the range of the specified instrument.
I don’t work for them, so I don’t know the answers to the other questions.
Yes, but that´s a bad solution, in my opinion.
Maybe colour the notes out of range, so that one can see, that there´s a problem. By hiding them, depending on the samples used, you will hear, but not see those notes.
With a fresh MIDI track I get the same settings.
The next tracks have different settings, but I did not edit those by myself.
The strange one is still the Juno Hi track:
