Svelte 5: bind:this prevents any child from stopping the propagation of an event to its parents

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Describe the bug

Hello,

Discovered a bug on svelte 5 with the bind:this.

Using bind:this on a element will break the bubbleing behavior for every child element down the DOM tree.
Any stopPropagation() triggers on an event in a child element will not stop correctly the propagation of the event and the parent will then still receive the event.

After a little investigation, it does not seem to come from the new way of attaching the events onevent instead of on:event neither having the runes mode on.

Something weird is really happening with the bind:this feature.

Reproduction

Here's the bug reproduction REPL on Svelte 5
The same thing running correctly with Svelte 4

Expected behavior: Click on the div with red border on Svelte 5 should not trigger the parent event because the propagation was stopped in the child.

Logs

No log

System Info

N/A

Severity

blocking an upgrade