iview form 表单的怪异小BUG

当同一个弹窗中的表单重复利用时：

我原先的代码逻辑是：

 <Form :label-width="100" class="mt20" ref="changeParam" :rules="ruleValidate"  :model="changeParam">
             <Row>
               <Col span="22">
                 <FormItem label="课程">
                   <Input v-model="info.f_lesson_name" disabled style="width:200px;"></Input>
                 </FormItem>
               </Col>
             </Row>
             <Row v-if="info.teacher_id > 0">
               <Col span="22" class='pr'>
                 <FormItem label="原授课老师">
                   <Input v-model="info.f_teacher_id" disabled  style="width: 200px"></Input>
                 </FormItem>
               </Col>
             </Row>
             <Row>
               <Col span="22" class='pr'>
                 <FormItem v-if="info.teacher_id > 0" label="新授课老师" prop="teacher_id">
                   <i class="clearSelect" v-if="changeParam.teacher_id"  @click="clearSelect">X</i>
                   <Select
                     style="width: 200px"
                     v-model="changeParam.teacher_id"
                     :disabled="changeParam.teacher_id ? true: false"
                     placeholder="请搜索后选择老师"
                     filterable
                     remote
                     :remote-method="searchTeacher">
                     <Option v-for="(item,key) in teacherList" :value="item.userid" :key="key"> {{item.f_campus ? item.f_campus: item.f_city }}-{{item.realname}}</Option>
                   </Select>
                 </FormItem>
                 <FormItem v-else label="授课老师" prop="teacher_id">
                   <i class="clearSelect" v-if="changeParam.teacher_id"  @click="clearSelect">X</i>
                   <Select
                     style="width: 200px"
                     v-model="changeParam.teacher_id"
                     :disabled="changeParam.teacher_id ? true: false"
                     placeholder="请搜索后选择老师"
                     filterable
                     remote
                     :remote-method="searchTeacher">
                     <Option v-for="(item,key) in teacherList" :value="item.userid" :key="key"> {{item.f_campus ? item.f_campus: item.f_city }}-{{item.realname}}</Option>
                   </Select>
                 </FormItem>
               </Col>
             </Row>
             <Row>
               <Col span="22" class='pr' v-if="info.teacher_id > 0">
                 <FormItem label="理由" prop="reason_service" style="font-size: 14px;">
                   <Select v-model="changeParam.reason_service" style="width:200px;">
                     <Option v-for='(item,key) in reason_service' :value="key" :key='key'>{{item}}</Option>
                   </Select>
                 </FormItem>
               </Col>
             </Row>
             <Row v-if='changeParam.reason_service == 99'>
               <Col span="22" class='pa'>
                 <FormItem label="备注" prop="remark">
                   <template>
                     <Input type="textarea" v-model="changeParam.remark" :autosize="{minRows: 2,maxRows: 5}"
                            placeholder="备注" style="width:300px;"></Input>
                   </template>
                 </FormItem>
               </Col>
             </Row>
           </Form>

更改后：

 <Form :label-width="100" class="mt20" ref="changeParam" :rules="ruleValidate"  :model="changeParam">
             <Row>
               <Col span="22">
                 <FormItem label="课程">
                   <Input v-model="info.f_lesson_name" disabled style="width:200px;"></Input>
                 </FormItem>
               </Col>
             </Row>
             <Row v-if="info.teacher_id > 0">
               <Col span="22" class='pr'>
                 <FormItem label="原授课老师">
                   <Input v-model="info.f_teacher_id" disabled  style="width: 200px"></Input>
                 </FormItem>
               </Col>
             </Row>
             <Row>
               <Col span="22" class='pr'>
                 <FormItem v-if="info.teacher_id > 0" label="新授课老师" prop="teacher_id">
                   <i class="clearSelect" v-if="changeParam.teacher_id"  @click="clearSelect">X</i>
                   <Select
                     style="width: 200px"
                     v-model="changeParam.teacher_id"
                     :disabled="changeParam.teacher_id ? true: false"
                     placeholder="请搜索后选择老师"
                     filterable
                     remote
                     :remote-method="searchTeacher">
                     <Option v-for="(item,key) in teacherList" :value="item.userid" :key="key"> {{item.f_campus ? item.f_campus: item.f_city }}-{{item.realname}}</Option>
                   </Select>
                 </FormItem>
                 <FormItem v-else label="授课老师" prop="teacher_id">
                   <i class="clearSelect" v-if="changeParam.teacher_id"  @click="clearSelect">X</i>
                   <Select
                     style="width: 200px"
                     v-model="changeParam.teacher_id"
                     :disabled="changeParam.teacher_id ? true: false"
                     placeholder="请搜索后选择老师"
                     filterable
                     remote
                     :remote-method="searchTeacher">
                     <Option v-for="(item,key) in teacherList" :value="item.userid" :key="key"> {{item.f_campus ? item.f_campus: item.f_city }}-{{item.realname}}</Option>
                   </Select>
                 </FormItem>
               </Col>
             </Row>
             <Row>
               <Col span="22" class='pr' v-if="info.teacher_id > 0">
                 <FormItem label="理由" prop="reason_service" style="font-size: 14px;">
                   <Select v-model="changeParam.reason_service" style="width:200px;">
                     <Option v-for='(item,key) in reason_service' :value="key" :key='key'>{{item}}</Option>
                   </Select>
                 </FormItem>
               </Col>
             </Row>
             <Row >
               <!--错误的地方-->
               <Col span="22" class='pa' v-if='changeParam.reason_service == 99'>
                 <FormItem label="备注" prop="remark">
                   <template>
                     <Input type="textarea" v-model="changeParam.remark" :autosize="{minRows: 2,maxRows: 5}"
                            placeholder="备注" style="width:300px;"></Input>
                   </template>
                 </FormItem>
               </Col>
             </Row>
           </Form>

具体原因我目前不清楚，但确实是把判断写在row中了，当更改后，就可以了；让自己下次注意。并且找时间找到为啥