World Partition is doubling my sky actors

In my level with Ultra Dynamic Sky and World Partition enabled, I keep getting multiple directional light errors every time I exit and re-enter the project. Ultra Dynamic Sky duplicates itself, even though I’m sure I only added a single Ultra Dynamic Sky blueprint. However, when I reopen the project, I strangely see two Ultra Dynamic Skies. This has happened 5-6 times now. Does anyone know the reason?