Fusion Connect for Media Composer & Alpha Channel

Hi,

I'm using Fusion connect with Media Composer (Awesome!), and the raw images that are rendered contain an alpha channel (it's a custom PIP effect). But it turns out to be black in media composer, I know Media Composer requires mattes in order for the alpha channel to blend. How can I solve this? Currently, instead of rendering with alpha channel, I make the background magenta (rgb 255, 0, 255) and key it out using the RGB Keyer effect in MC 8.6. This is not ideal since there is a very small chance the color is used in the containing video. Is there a way I can use the alpha channel instead?

Kind regards,
NIck