So i can confirm this issue occurs with the new blender LTS version. For me its currently 4.2.3 LTS.
I cant find a way to lower this and unreal wont let me change it either. Only way for me is to import the file into an older version and import it then into unreal. 
PS: This has no impact on the build game or in editor, seems like this will only have problems in cinematic rendering. So this wont impact my game in any way.