teleport children is immediately removed from html when `disabled=true` in `transition`

[07akioni]

Version

3.0.0

Reproduction link

https://codesandbox.io/s/teleport-bug-1-koszy?file=/src/App.vue

Steps to reproduce

follow the link.

What is expected?

when teleport is disabled, it shouldn't be unmounted immediately inside transition.

What is actually happening?

it disappeared immediately