Some trucks are still taking small loads of like two or 8 when working on rails. Many of them do take larger amounts though, but not always full loads, a bit less than half usually.
I tried it with allow partial loading on and off and it happens with both, though might be working better with allow partial loading off.
Reproduction:
- Load the save.
- Unpause. There's a lagspike when they all try to pathfind at once, only lasts a second though.
- Which ones only take a small load seems random, so, keep an eye on them. I've tried it with allow partial loads on and off.

