According to the licensee report,
It seems that this can be avoided by changing the above value.
However, changing SINGULARITY_THRESHOLD value is risky,
Workarounds have been proposed to change the following functions and add small values.
I want to know if there is a better way to deal with it.
1. Open 1.umap of the attached project.
2. Set Rotation.Z of ParentActor to 180.
3. When saving, the value of “Rotation of SM_Pole_16” changes.
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-84407 in the post.