nested router with nested keepalive will invoke onMouted twice

[Dchih]

Vue version

^3.4.29

Link to minimal reproduction

https://stackblitz.com/edit/vitejs-vite-otefqw

Steps to reproduce

click switch(切换) button, check console , then you'll see twice output

What is expected?

call onMounted once

What is actually happening?

nested router-view width nested keepalive will cause twice onMounted hook call in inner nested component.
目的是想让 keep-alive 缓存嵌套路由的所有组件，结果发现二层嵌套中 keep-alive 包的组件在首次切换的时候会调用两次 onMounted

System Info

win10
chrome@latest

Any additional comments?

No response

[linzhe141]

minimal reproduction with playground

[edison1105]

similar to #7280
duplicate of #3937
For more detail see vuejs/router#626