Hi, I found that Entities 0.0.12-p31 broke my system, especially used with IJobForEach. When my world has two entity0, entity1, which has common ComponentA and other tag components, IJobForEach<ComponentA>.Schedule(ComponentBaseSystem) fetch only one entity. When I changed to Schedule(entityQuery), it correctly process both entities. (this example is very simplified.) With previous version, this issue did not occured. I think that below changes makes this issue: Is this intended behaviour? Thanks.