Need help for an issue I'm experiencing with multiple tracks in the piano roll on C15

Check out the video:

Here I’m editing two tracks at once in a single piano roll editor. You can see that all notes stay black on other tracks’ MIDI, not just the one I’m editing. In the video, when I open the piano roll the first track’s MIDI notes are already black before anything is selected. Then the issue I’m referring to also happens to the other tracks’ MIDI when its notes are selected. This makes editing for multiple MIDI tracks at once impossible, of course.

For me in C14 it works perfectly: Whatever notes you select are highlighted (not black), and the rest stay dim.

I thought it was a bug and that I had seen it mentioned here, but turns out maybe others aren’t experiencing it.

I’ve tried disabling preferences, disabling plugins, and even re-installing C15.

Asking for some help from Steinberg or anyone who has an idea what the issue might be. I’m on Mac Sequoia.

Anyone else experiencing this issue? Trying to figure out what I need to do to fix it.

Not me. I tried to reproduce it, to no avail.

OK, thank you. It’s gotta be something here, just don’t know what else to try since I tried disabling plugins and preferences, and also re-installing. I’d love for someone from Steinberg to jump in here with anything to try. Tried customer support but I haven’t heard back in a long time.