Version

3.2.4

Reproduction link

https://github.com/Fiona-SUN/vue3-minimal-reproduction

Steps to reproduce

1. update vue to 3.2.4, install @vue/compat of the same version
2. install UI Components Vant 3.2.0
3. Global Register Toast (eg: https://youzan.github.io/vant/v3/#/en-US/quickstart#cdn)
4. use this.$toast.loading in .vue file

What is expected?

The project should run on Vue 3 with Vant.

What is actually happening?

Uncaught(in promise) TypeError: this.$toast.loading is not a function.project broken

PublicInstanceProxyHandlers function use Function.prototype.bind() cause Toast lost some properties.
if there have any other methos to resolve the problem instead of Function.prototype.bind().