I was experiencing this same issue. Not at first, but it "suddenly" started to happen and couldn't figure out why. I finally realized that it started happening when I changed the Performance options under Settings > App Properties > Advanced settings > Performance options, by checking the "Load all embedded reports on a form when the form loads" checkbox. I went back into settings and unchecked the box and the automation to add child records functions like it did before, without having to refresh the page again.
