I have raised this PR to fix the mod, only a few changes from what I can see.
https://github.com/shanemadden/factorio-deadlock-beltboxes-loaders/pull/28/
Side loading into a loader has been stopped by game code.
Changed loader to only connect to the front belt, not from side. This is to fix internal problems related to modded loaders with custom sizes and side loading of it.
