[Bug Report][3.3.8] v-icon doesn't display "icon" when slot is filled

[Modjular]

Environment

Vuetify Version: 3.3.8
Vue Version: 3.3.4
Browsers: Chrome 114.0.0.0
OS: Mac OS 10.15.7

Steps to reproduce

Create an empty v-btn. Populate the icon prop. An icon-button should appear
Add a comment or an empty <template></template>. 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.

[yubaoquan]

Am I facing the same issue?
Icon gone, a blank round button remains.
This is expected behavior?

<v-btn density="compact" icon="mdi-filter" color="#e2e8f0">
    <v-dialog activator="parent" max-width="340">
      <template #default="{ isActive }">
        <v-card prepend-icon="mdi-filter" :title="$t('dutor.setFilterConditions')">
          <v-divider></v-divider>
          <v-card-text class="px-4"> building... </v-card-text>
          <v-card-actions>
            <v-btn :text="$t('common.cancel')" @click="isActive.value = false"></v-btn>
            <v-spacer></v-spacer>
            <v-btn
              color="surface-variant"
              :text="$t('common.confirm')"
              variant="flat"
              @click="handleConfirm(isActive)"
            ></v-btn>
          </v-card-actions>
        </v-card>
      </template>
    </v-dialog>
  </v-btn>

[emelendez]

I don't understand why this bug is closed,
as today i faced this problem with:

<v-btn  icon="mdi-eye" >
    <v-dialog activator="parent">
        <v-sheet class="bg-white">
            <ita-form-recommended />
        </v-sheet>
    </v-dialog>
</v-btn>

At least, in VDialog documentation show a warning using activator="parent" within a VBtn of type "icon"
where a correct use would be:

<v-btn  icon>
   <v-icon icon="mdi-eye" />
    <v-dialog activator="parent">
        <v-sheet class="bg-white">
            <ita-form-recommended />
        </v-sheet>
    </v-dialog>
</v-btn>