为什么未使用的输入框也会受到Vue指令的验证影响？

Vue.directive('validateNumber', {
    bind(el, binding, vnode) {
        let lastData = null;
        el.onkeyup = (e) => {
            if (String.fromCharCode(e.keyCode) === 'E' || String.fromCharCode(e.keyCode) === 'KeyE') {
                e.target.value = lastData;
                return false;
            } else {
                lastData = e.target.value;
            }
            e.target.value = e.target.value.replace(/[^\d]/ig, '');

            let _this = vnode.context;
            _this.accessNestedObject(_this, vnode.data.model.expression, e.target.value);

            // 此处逻辑可能存在问题，导致影响其他输入框
            if (binding.expression && e.target.value) {
                let obj = (new Function("return " + binding.expression))();
                let keys = Object.keys(obj);
                let values = Object.values(obj);
                if (keys[0] === 'min') {
                    if (e.target.value < values[1]) {
                        e.target.value = values[1];
                    }
                }
            }

            el.dispatchEvent(new Event('input'));
        };
    }
});

<el-form-item label="等待时间" prop="timeInterval">
  <el-input id="alarm-rule-time-interval" style="width:100%" type="number" v-model="alertRulesForm.timeInterval" v-validateNumber>
    <template slot="append">秒</template>
  </el-input>
</el-form-item>
<el-form-item label="空间间隔" prop="distanceInterval">
  <el-input id="alarm-rule-distance-interval" type="number" v-model="alertRulesForm.distanceInterval">
    <template slot="append">米</template>
  </el-input>
</el-form-item>

_this.accessNestedObject(_this, vnode.data.model.expression, e.target.value);