Delete button no longer working in C13

I have a an Apple extended blue tooth wireless kbd. It works great on all my other programs. However, on C13 (and N13) the delete button no longer does anything. The delete button on the normal part of the kbd works, but the one on the extended part (with the little x which was the one I used the most) doesn’t work. Like I mentioned, it works normally on all my other apps, just not in Cubase. I tried a different wired kbd and it does the same thing, that delete button on the extended section does nothing.
Anybody else?