'Watch route.params' occurs twice when using with pinia store.

[miyaoka]

Version

4.0.14

Reproduction link

codesandbox.io

Steps to reproduce

• Open the console.
• Click 'page1' link.
• Click 'home' link. (Page component unmounted)
• Click 'page1' again. Then 'watch route.params' called twice (once is called before setup).
• Then click 'page2' and it will be called twice as well.

--created page component-- 
useRoute.params: {pageId: "1"} undefined
$route.params: {pageId: "1"} undefined
useRoute.params: {} {pageId: "1"}
$route.params: {} {pageId: "1"}
--unmounted page component-- 
useRoute.params: {pageId: "1"} {} // <- twice called.
--created page component-- 
useRoute.params: {pageId: "1"} undefined  // <- twice called.
$route.params: {pageId: "1"} undefined

What is expected?

watch occurs only once.

What is actually happening?

watch occurs twice.

---

If you don't use pinia store with useRoute and watch, then works correctly.

[posva]

This will be fixed by vuejs/core#5575

The regression was introduced in vue@3.2.30 so you can use the precedent version until a new one is released.