This is a race condition, did not crash with -onethread. Attached the collected threaded callstacks, although they look misaligned.

Licensee has provided a suggested fix.

Steps to Reproduce

Download the attached repro ( and open in 5.0 latest

Delete box number 3, crash should happen immediately.

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ComponentUE - LD & Art - World Building - HLOD
Affects Versions5.0
Target Fix5.0.2
Fix Commit20043381
Main Commit20048010
CreatedMay 3, 2022
ResolvedMay 4, 2022
UpdatedMay 16, 2022