Specifically, when:
* Two providers are online (have >1 train of fluid)
* One requester comes online
In this case, the conditions for the interrupt are satisfied for _two trains in the depot_. Even though the first train gets scheduled, routing to one provider and the requester, the provider doesn ...

So far I have the same, but I've been trying a couple of things to try and stop full trains waiting in the depot:
- Trains with items can't go back to the depot, and will sit in the pickup stations
- Depots are set to low priority, so the full trains at pickups will move first

This works, but to be ...