I can still hear my MIDI track on playback, but the regions are missing. When I expand my piano roll, nothing. When I click a visible automation lane, the tracks disappear. I am not sure how to fix this. Please see screenshots. This occurred after pressing z on the keyboard. Not sure why that would cause this issue.I could be wrong, perhaps it is something else.
Thank you.
Version of Ardour? Platform?
Ardour v8.12.0. I’m on Manjaro 25, but I download from Ardour.org and install to /opt/.
Don’t know if kernel matters, but I am on 612 LTS.
That is a very weird color theme …
We have seen a couple of other reports of this, but not been able to reproduce it. We would need a precise recipe that is completely (or mostly) reproduceable.
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Needed more contrast on the different barline/subdivisions, so I picked some colors… 
I was able to repeat; however, it is a combination of pressing f to expand automation and pressing z afterward. I tried it a third time with only a midi track and master track, and everything is okay – region stays in place, nothing is borked. However, as soon as I show automation, and do the same thing to an automation lane, that is when the glitch occurs. Again, it can still play back, I just cannot click anything or edit, etc.