[Bug]: 3rd party modal inside reka-ui dialog is not working

[jardakotesovec]

Environment

Developement/Production OS: OSX 15.6.1
Node version: 22.17.1
Package manager: npm@10.9.2
Reka UI version: 2.6.1
Vue version: 3.5.24
Browser: Chrome 142.0.7444.162

Link to minimal reproduction

https://github.com/jardakotesovec/reka-ui-modal-reproduction

Steps to reproduce

Open the app in your browser
Click "Open Modal" button
In the TinyMCE editor inside the modal, click the "Link" button in the toolbar
Try to type in the URL input field

Describe the bug

When I add tinyMCE to the reka-ui modal. Modals that are opened directly from tinyMCE can't get focus.

Expected behavior

3rd party modals inside reka-ui modal should work.

Context & Screenshots (if applicable)