Strip assign FX ultra bug

I think I found a small bug, when you use the +1 function in the strip assign menu it stops before adding the 4th fx ultra send.
Example:
I assign fx ultra send 1 to a fader, then press +1 it will add fx ultra send 2 and 3, not 4.
This is not happening with regular fx sends.

@Gabriele_Gritti

Good spot! This is indeed a little bug and has been logged.

Thanks,

Keith.