Sound disappears after formant shift

Hi guys,
I’m trying to shift the formant down on a vocal sample, but for some reason, as soon as I do, the sound of the sample disappears completely & I’m left with silence. Any ideas why this would be happening???

If you have the same bug as me, the quickfix is to press s (solo) two times (activate and deactivate solo). The bug has been around since variaudio was introduced back in c5. (Or close the editor window and reopen it.)

ah, great. Thanks.