Bug: spurious controller lanes appear in Key Editor

In my project, I add a controller lane to an instrument channel. Then I close the editor and re-open it. There are now two identical controller lanes. Close and open again: 4. Gets silly fast:

Platform: Windows 11.
Version 13.0.30

Hi,

Does this happen with this only one project, or can you reproduce it with any project, please?

Not seeing that here. Any other possible clues?

When you put data in the Lane does it appear in the replicants?

Ok well I’ve spent a few hours messing trying to repro this and it has stopped as suddenly as it started! Frustrating.

Yes! Weird.