I made a type of falling block duplicator that utilizes a certain mechanic made possible with the end portals found in the stronghold. Basically you use giant mushrooms to remove the portal frames and use a slime block mechanism that allows duplication of dragon eggs. From my understanding, the machine is able to propel the falling block a specific way with a specific timing so that the block both goes through the portal while simultaneously remaining in the Overworld. I can upload photos if this is confusing.
My issue is that for some reason (likely due to Paper), the dragon eggs aren't staying in the Overworld as they should be, they just go through the portal, defeating the purpose of the duper. If it helps, I already have the setting for allowing piston duping adjusted to "true" in the paper.yml file. I was wondering if someone who knows more about the specifics of Paper knows what setting I should be adjusting, or if this is even an issue with Paper at all. Thanks for any help you can give.