fix(suspense): avoid updating anchor if activeBranch has not been rendered to the actual container

[edison1105]

close #11806

[github-actions]

Size Report

Bundles

File	Size	Gzip	Brotli
runtime-dom.global.prod.js	100 kB (-16 B)	37.7 kB (-3 B)	33.9 kB (-7 B)
vue.global.prod.js	159 kB (-16 B)	57.6 kB (-5 B)	51.2 kB (-19 B)

Usages

Name	Size	Gzip	Brotli
createApp	55.2 kB	21.2 kB	19.4 kB
createSSRApp	59.1 kB	22.9 kB	20.9 kB
defineCustomElement	59.9 kB	22.8 kB	20.7 kB
overall	68.9 kB (-16 B)	26.3 kB (-3 B)	24 kB (+74 B)

[pkg-pr-new]

Open in Stackblitz

@vue/compiler-core

pnpm add https://pkg.pr.new/@vue/compiler-core@11818

@vue/compiler-dom

pnpm add https://pkg.pr.new/@vue/compiler-dom@11818

@vue/compiler-sfc

pnpm add https://pkg.pr.new/@vue/compiler-sfc@11818

@vue/compiler-ssr

pnpm add https://pkg.pr.new/@vue/compiler-ssr@11818

@vue/reactivity

pnpm add https://pkg.pr.new/@vue/reactivity@11818

@vue/runtime-dom

pnpm add https://pkg.pr.new/@vue/runtime-dom@11818

@vue/runtime-core

pnpm add https://pkg.pr.new/@vue/runtime-core@11818

@vue/server-renderer

pnpm add https://pkg.pr.new/@vue/server-renderer@11818

@vue/shared

pnpm add https://pkg.pr.new/@vue/shared@11818

vue

pnpm add https://pkg.pr.new/vue@11818

@vue/compat

pnpm add https://pkg.pr.new/@vue/compat@11818

commit: ddf5fe3