Discrepancy in parent resolving for vue custom element and vue component

[lejunyang]

Vue version

3.5.13

Link to minimal reproduction

https://play.vuejs.org/#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

Steps to reproduce

We can see from the inject texts:

In vue component, Child component's parent is "Parent', its actual slotted parent
but in custom element, Child component's parent is "GrandParent"

What is expected?

should have same behavior

What is actually happening?

For now in custom element, parent resolving is done by iterating parentNode and host, we should check assignedSlot first to get actual slotted parent in actual render tree order

System Info

No response

Any additional comments?

No response