hey there!
So I am not sure why it would loose product sometimes but I am pretty sure there is nothing I can do about it. All this mod (and my other baler mods) do is have a custom bale data list with increased capacities and "lose when cutting" is not something the game controls by default, it must just be a little quark of how the game works and it gets exaggerated with these extra large capacities.
The weight of the product in the baler I could probably address pretty easily.