Unreal Engine Issues and Bug Tracker (UE-259478)

Description

IsStreamingCompleted returns true while standalone level instances are still fully loading.

Steps to Reproduce

Create a WP level with a data layer.
Add a standalone level instance to this data layer.
During runtime
- Check IsStreamingCompleted.
- Activate the data layer.
- Notice IsStreamingCompleted returns true then false then true.

There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-259478 in the post.

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Unresolved

Component	UE - World Creation - Worldbuilding Tools - World Partition
Target Fix	5.6

Created	Mar 21, 2025
Updated	Mar 24, 2025

World Partition IsStreamingCompleted returns true while standalone level instances are still fully loading