Dropdown displaying as radio options when deployed

[Yazster]

Hi all,

I've created a report when one of my parameters has 2 non-queried available values (where values=True/False), and my data type is set as boolean. This works fine in the preview, however when I deploy it, my dropdown suddenly becomes two radio buttons labeled true/false.

Anybody have an idea why this is happening?

Thanks,
Yazster