I can't really see where in the code but it seems like prop.init's logic is using an || to apply the default where it probably should be a ??

In the reka demo, I set a new prop showTitle and set it to true by default, I then use this to conditionally show the title

If I want to set that to false and hide the title, showTitle still evaluates to true

I tried to look for where prop.init is being used here but I couldn't find it, I'll keep digging and am happy to contribute a PR for this once I find this.