Macros created from "Soundboard by Blitz" do not activate in Custom Hotbar

[itsQbic]

With the soundboard open, I click on the "Toggle Macro Mode" button.

This creates a macro in the "Macro Directory". If I drag that macro into the core hot bar, then I can activate the macro normally and nothing is wrong. When I drag it into the Custom Hotbar, pressing the activation key won't play the sound. I've tested this with core macros by dragging spells from character sheets and they seem to function normally.

Here is a screenshot of what the macro generated by Soundboard by Blitz looks like: