Can't render named slot conditionally

[AlexandreBonaventure]

Version

3.0.0-beta.20

Reproduction link

https://jsfiddle.net/naj7v2yu/

Steps to reproduce

Render conditionally a named slot with v-if directive.

What is expected?

When v-if condition is true it should render correctly and override the default slot content. In the repro above, the caption should switch alternatively to show
I'm rendered in a slot and I'm the default slot

What is actually happening?

The slot fails to render. In the repro I'm the default slot is always shown.

If you remove the v-if directive, I'm rendered in a slot shows up as expected