【报Bug】scroll-view自定义刷新后无法二次刷新

示例代码：

<template>  
    <view>  
        <scroll-view style="height: 300px;" scroll-y="true" refresher-enabled="true" :refresher-triggered="triggered"  
            :refresher-threshold="100" refresher-background="lightgreen" @refresherpulling="onPulling"  
            @refresherrefresh="onRefresh" @refresherrestore="onRestore" @refresherabort="onAbort"></scroll-view>  
    </view>  
</template>  
<script>  
    export default {  
        data() {  
            return {  
                triggered: false  
            }  
        },  
        onLoad() {  
            this._freshing = false;  
            setTimeout(() => {  
                this.triggered = true;  
            }, 1000)  
        },  
        methods: {  
            onPulling(e) {  
                console.log("onpulling", e);  
            },  
            onRefresh() {  
                if (this._freshing) return;  
                this._freshing = true;  
                setTimeout(() => {  
                    this.triggered = false;  
                    this._freshing = false;  
                }, 3000)  
            },  
            onRestore() {  
                this.triggered = 'restore'; // 需要重置  
                console.log("onRestore");  
            },  
            onAbort() {  
                console.log("onAbort");  
            }  
        }  
    }  
</script>

操作步骤：

刷新一次后再次刷新

预期结果：

刷新一次后可再次刷新

实际结果：

手动刷新一次后无法二次刷新