That issue is actually a game bug. I'm not sure why it happens but it's been happening, particularly to recycling/energy-producing garbage facilities. Take a look at the comments of the recycling center mods.

Hi i test your work and somehow when the truck not reach the garbage storage, the asset of garbage that already taken back into Zero.

Ex: my truck move around city for 1 day. he take at least 80%.
Not moving to Garbage storage, the asset of garbage truck decrease into Zero.
The truck not going back into garbage storage, but moving around city again taking more garbage.

Well this might be good. but sorry this one is one hell bug that need to fixed.
1. I am using a garbage processing plant where I got most of my electricity from that building.
2. somehow the building keep spaming the truck when my truck can reach some part of the city that they need some care about garbage.

I hope you can fix this mod. I really love your mod.