Svelte 5: createClassComponent ignores anchor

[Razunter]

Describe the bug

createClassComponent legacy method ignores anchor property

Reproduction

https://stackblitz.com/edit/vitejs-vite-vutzpt?file=src%2Fmain.ts

Logs

No response

System Info

System:
    OS: Linux 5.15 Ubuntu 22.04.5 LTS 22.04.5 LTS (Jammy Jellyfish)
    CPU: (20) x64 12th Gen Intel(R) Core(TM) i7-12700KF
    Memory: 10.34 GB / 15.55 GB
    Container: Yes
    Shell: 5.8.1 - /usr/bin/zsh
  Binaries:
    npm: 10.9.0 - /mnt/c/Program Files/nodejs/npm
    bun: 1.1.32 - /tmp/bun-node-fe8d0079e/bun
  npmPackages:
    rollup: ^4.24.0 => 4.24.0
    svelte: ^5.0.5 => 5.0.5

Severity

blocking an upgrade