Duplicate slot name message for custom components which allow duplicate slot properties.

[sachinbhutani]

Describe the bug

While using svelte extension on VS code, I get the "Duplicate slot name xxxx' in while the webcomponent does allow for duplicate slot names
example

<ui5-side-navigation>
    <ui5-side-navigation-item slot="fixedItems" text="Useful Links" icon="chain-link"></ui5-side-navigation-item>
    <ui5-side-navigation-item slot="fixedItems" text="History" icon="history"></ui5-side-navigation-item>
</ui5-side-navigation>

slot fixedItems, can be used multiple times according to the documentation and example on https://sap.github.io/ui5-webcomponents/playground/?path=/docs/fiori-side-navigation--docs

another example where slot name "valueStateMessage" is for completely different input fields on the same form

    <ui5-input id="field1" value="field 1 value">
         <div slot="valueStateMessage">{err.errorMessage}</div>
   </ui5-input>
    <ui5-input id="field2" style="width:100%" readonly value="field2 Value ">
        <div slot="valueStateMessage">{err.errorMessage}</div>
    </ui5-input>

Reproduction

v108.2.1
https://github.com/sachinbhutani/svelte-slot-error

Expected behaviour

duplicate slot name message should not be displayed for custom components
duplicate slot name message should not be displayed for slot property

System Info

• OS: Windows
• IDE: VS Code

Which package is the issue about?

No response

Additional Information, eg. Screenshots

No response

[jasonlyu123]

I can't reproduce this with the code snippet. Please provide a reproduction repository or REPL link,

[sachinbhutani]

Added repo and screenshot.
https://github.com/sachinbhutani/svelte-slot-error
I realized this is happening only with svelte 5 preview.