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packages/frontend/src/components/MkReactionsViewer.vue

 <template>
-<div class="tdflqwzn" :class="{ isMe }">
+<Transition :name="$store.state.animation ? 'y' : ''">
+<div v-if="Object.keys(note.reactions).length > 0" class="tdflqwzn" :class="{ isMe }">
 	<TransitionGroup :name="$store.state.animation ? 'x' : ''">
 		<XReaction v-for="(count, reaction) in note.reactions" :key="reaction" :reaction="reaction" :count="count" :is-initial="initialReactions.has(reaction)" :note="note"/>
 	</TransitionGroup>
 </div>
+</Transition>
 </template>
 
 <script lang="ts" setup>
@@ -22,6 +24,16 @@ const isMe = computed(() => $i && $i.id === props.note.userId);
 </script>
 
 <style lang="scss" scoped>
+.y-enter-active, .y-leave-active {
+	overflow: clip;
+	max-height: 36px;
+	transition: opacity 0.2s cubic-bezier(0,.5,.5,1), max-height 0.2s cubic-bezier(0,.5,.5,1) !important;
+}
+.y-enter-from, .y-leave-to {
+	max-height: 0px;
+	opacity: 0;
+}
+
 .x-move, .x-enter-active, .x-leave-active {
 	transition: opacity 0.2s cubic-bezier(0,.5,.5,1), transform 0.2s cubic-bezier(0,.5,.5,1) !important;
 }