【报Bug】自定义组件的slot用另一个自定义组件，props的所有属性为null

my-form.vue

 <bjx-form  
      :rules="rules"  
      :form="form"  
      msg-type="msg"  
      labelType="inline"  
      labelWidth="230"  
      ref="form"  
    >  
      <view  
        v-for="(item, index) in option.column"  
        :key="index"  
      >  
        <bjx-form-item  
          :label="item.label"  
          :prop="item.prop"  
        >  
          <template v-if="item.componentType==='slot'">  
            <slot  
              name="prop"  
              :slotData="item"  
            >  
            </slot>  
          </template>  

          <template v-else>  
            <input  
              v-model="form[item.prop]"  
              :type="item.inputType"  
              :maxlength="item.maxlength||-1"  
              :placeholder="item.placeholder"  
            />  
          </template>  
        </bjx-form-item>  
      </view>  
    </bjx-form>

my-check.vue

<template>  
  <view  
    class="flex ac my-check"  
    @tap="onClick"  
  >  
    <view  
      class="icon"  
      :class="{check:check}"  
    />  
    <slot></slot>  
  </view>  
</template>  
<script>  
export default {  
  name: 'MyCheck',  

  props: {  
    check: {  
      type: [Boolean, Number, String],  
      default: false,  
    },  
  },  

  methods: {  
    onClick() {  
      debugger  
      return this.$emit('change', !this.check) // 这里为null  
    },  
  },  
}  
</script>

my-page.vue //这是页面

<my-form  
          formName="form"  
          :option="option1"  
        >  
          <view  
            slot="prop"  
            slot-scope="{slotData}"  
          >  
            <template v-if="slotData.prop==='key3'">  
              <view class="flex ac">  
                <input  
                  :value="form.key3"  
                  @change="form.key3=$event.detail.value"  
                  :maxlength="slotData.maxlength"  
                  :placeholder="slotData.placeholder"  
                />  
                <!-- 这里给mycheck绑定check的值，change可以收到 -->  
                <my-check  
                  :check="form.key7"  
                  @change="form.key7=$event"  
                ><text>测试mycheck</text></my-check>  
              </view>  
            </template>  

          </view>  

  </my-form>  

<!-- 放在my-form外面就没问题 -->  
   <my-check  
                  :check="form.key7"  
                  @change="form.key7=$event"  
                ><text>测试mycheck</text></my-check>