[Bug Report] showLoadingToast部分IOS高版本（eg: 26.5）出现首次loading，动画效果没有加载

import { closeToast, showLoadingToast, showToast } from 'vant'

const onSubmit = async () => {
  loginWayType = LoginByType.BY_CODE
  if (!checkPolicy()) {
    return
  }

  if (!(await checkNetwork(true))) {
    return
  }

  showLoadingToast({
    duration: 0,
    className: 'loading-toast',
    forbidClick: true
  })

  const { bizCode, data } = await apollo.ych.verifyPrincipleExists({
    data: JSON.stringify({
      accountType: 1,
      principle: loginInputStore.value.principle, // 手机号，根据实际修改
      mobileCode: loginInputStore.value.mobileCode // 区号，根据实际修改
    })
  })

  closeToast()

  if (bizCode === -1) {
    serverErrorToast()
    return
  }

  const { ret, data: params, error, bizCode: resultBizCode } = jsonParseRes(data)
  const { exists } = params || {}

  if (ret > -1 && exists !== undefined) {
    console.log('account exist: ' + data)
    loginStore.updateEnterCodeStore({
      email: '',
      principle: loginInputStore.value.principle,
      accountType: 1,
      mobileCode: loginInputStore.value.mobileCode,
      password: ''
    })
    existsValue.value = exists
    loginStore.updateInVerify(true)
    return
  }

  toastBizCodeErrorMsg(resultBizCode, error)
}