[Bug Report][3.6.9] v-icon doesn't display "icon" when slot is filled (regression from 3.0.0 beta 5)

[GreyXor]

Environment

Vuetify Version: 3.6.9
Last working version: 3.0.0-beta.4
Vue Version: 3.4.29
Browsers: Firefox 129.0
OS: Linux x86_64

Steps to reproduce

Create an empty v-btn. Populate the icon prop. An icon-button should appear
Add a comment or an empty . The icon disappears, but the button remains.

Expected Behavior

Icon remains

Actual Behavior

Icon disappears

Reproduction Link

https://play.vuetifyjs.com/#...

Other comments

This is mostly annoying when using an icon-button to activate a v-dialog. The modal sits inside the button, but there's no actual "content" in the slot, which I assume tells the component to not utilize the icon anymore.

I can see this not being a bug, just unintended but technically correct behavior.

used to work in Vuetify 3.0.0 beta 4

[GreyXor]

#17807 is closed without any reason. So I had to open a new one.