input标签v-model属性失效

 问题：input标签v-model属性失效，清空ans, 但是ui上依然显示。 html和js代码

<input @input="onInputChange" class="ans" v-model="ans" auto-focus><input>

	const onInputChange = () => {
		if (ans.value === ques.value) {
			endTime = Date.now();
			ans.value = ""; // 清空了值，但是ui上依然显示
			typemasterCharp[ques.value]
			ques.value = "A";
			startTime = Date.now();
		}
	};

 解决方案： 使用nextTike, 注意要import

<script setup>
	import {
		ref,
		computed,
		onMounted,
		onUnmounted,
		nextTick
	} from "vue";

	const onInputChange = () => {
		if (ans.value === ques.value) {
			endTime = Date.now();
			nextTick(() => {
			            ans.value = ""; // 再次确保 UI 更新
						console.log("已清空");
			        });
			typemasterCharp[ques.value]
			ques.value = "A";
			startTime = Date.now();
		}
	};
<script>

疑惑： 很奇怪的一点是，nextTick()前边再加一句ans.value=""就又失效了，真离谱，如下

	const onInputChange = () => {
		if (ans.value === ques.value) {
			endTime = Date.now();
			// console.log(endTime - startTime);
			// console.log(ans.value);
			ans.value = "";
			nextTick(() => {
			            ans.value = ""; // 再次确保 UI 更新
						console.log("已清空");
			        });
			// console.log("已清空");
			// console.log(ans.value);
			typemasterCharp[ques.value]
			ques.value = "A";
			startTime = Date.now();
		}
	};