[Dialog] Leave transition not working when using :unmount="false" (vue)

[benjamincanac]

What package within Headless UI are you using?

@headlessui/vue

What version of that package are you using?

v1.7.19

What browser are you using?

Chrome

Reproduction URL

https://stackblitz.com/edit/vitejs-vite-jh8put?file=src/components/Dialog.vue,src/App.vue&terminal=dev

Describe your issue

I've made a minimal reproduction following the example on https://headlessui.com/vue/dialog with :unmount="false" on the Dialog, TransitionRoot and TransitionChild components.

The leave transition is not working unless the ref is true when first loading the page. You can see on reload it will work, but it won't when closing it the second time.