After looking in editor mode, it seems the problem is that the custom loader you use for input outside the factory is not registered as a loader, and therefore the "Stacking Loaders" mod does not set their maximum stacking size.
There are two solutions I see as a dev too:
- Register the liteception-loader to the "loader" prototype so that this case in particular is resolved
- Use the vanilla express-loader so that this kind of issue tends to resolve the vanilla way
After looking a bit more in editor mode, it seems the infinity chests are placed weirdly too. If I activate cheats, destroy and replace the chest, and finally replace the loader, everything works, but just replacing the loader, it doesn't output anything. It is as if the loader does not recognise the infinity chest until it is destroyed then replaced.