You chose 4.7 as the Product Version but your other issues are in 4.8. Is 4.7 the correct version to test this in?
I tested a blueprint that uses several child actors in 4.7 & 4.8 but I couldn’t get your results. Could you try testing this in a new project and seeing if you still get the same results? If you do, please provide a throughout as possible repro steps or a test project.
We haven’t heard back from you in a few days, so we are marking this post as resolved for tracking purposes. If you’re still experiencing this issue, please feel free to post back here with additional information.