Ghost notes when recording sequence on overdub

[deterson]

Hi,
On a Keystep 37 black, latest firmware (1.0.4), when I record a sequence from scratch, and that I use overdub, I have ghost notes that appear out of nowhere (that I suspect to come from the previous sequence).

I saw several posts mentionning this problem. Do I have to send my keystep back?

here's a video to demonstrate the problem:

https://youtu.be/Q7YJEMGqkhQ