This described preload issue was present long before the lazy loading implementation and is in no way exclusively relative to that. Instead its relative to the way things are managed in the setup and structure that Blocs has in place regarding the preloader logic. I remember it being discussed back in 2016 (Blocs 2) and the logic was slightly changed from the original since that thread. But the same overall issue still remains 4 years later on Blocs sites that I’ve seen.