Difference in functionality between Vue and React versions of the Dialog (Modal)

[JochemBruijninckx]

I noticed that the example at https://headlessui.com/vue/dialog fades in on the React version (which seems intended from the transition classes), while on the Vue version it appears instantly. I have tried to create a version in Vue in which the enter transition works; but whenever I wrap content in a Dialog in a transition, that content appears instantly. Is this intended, a bug or something that is simply not possible in Vue?