next.167 breaks <svelte:component> in development mode

[vits]

Describe the bug

Hello,
next.167 breaks <svelte:component> in development mode (vite). Changing this value makes component disappear. If svelte:component is put inside {#key ..} and key is updated as well, new component is appended to the old ones, ie. <svelte:component> grows and renders all previous components before the new one.

This problem does not exist in next.166 and disappears in production after vite build.

Reproduction

Can't provide REPL, as there is no problem in production mode.
C1 and C2 are any components, just different visually.
Changing to V5 syntax also doesn't help.

<script>
import C1 from "./C1.svelte";
import C2 from "./C2.svelte";

let comp = C1
function change() {
    comp = comp === C1 ? C2 : C1;
}
</script>

<svelte:component this={comp}></svelte:component>
<button on:click={change}>change</button>

Logs

No response

System Info

svelte: 5.0.0-next.167

Severity

blocking all usage of svelte