Steps to Reproduce

1.Keep "save LOD Actors to HLOD Packages" on in the project settings.

2.Regenerate proxy meshes and rebuild HLOD.

3.Build lighting.

4.Change preview device to Android ES3.1.

5.Now we could see the lightmap behaves normal.

6.Change forced HLOD level to LOD0 in hierarchical LOD outliner.

7.The lightmap for HLOD proxy mesh also behaves normal.

8.Reopen the level and Switch forced HLOD level to LOD0 in hierarchical LOD outliner.

9. Now the lightmap for HLOD proxy mesh is lost, and the viewport shows the "lightings need to be rebuilt" message.

Test project is here: [Link Removed]

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Unresolved
ComponentUE - LD & Art - World Building - HLOD
Affects Versions4.275.1
Target Fix5.2
CreatedJan 11, 2022
UpdatedAug 26, 2022