Dorico triggering key switch and unsure why? (VDL v2.5.6)

I am writing for a Drumline. I have some buzz rolls written in Tenor Line. It’s not the end of the world, but the Z on stem is triggering a Key switch of D0 (D zero), which plays with the puffy mallets, and which I do not have selected anywhere.

Can someone explain to me what I am missing?

Quad buzz roll test.dorico (2.1 MB)

Video link: (If you can zoom in on Kontakt player, you see it switching)

Robby