There is some inconsistent behaviour with network signals:
1. Set up stations (depot, provider, request) for network A.
2. Send a train to depot after the warmup period.
3. While the train is parked at the depot, change signal to network B.
4. Train still serve network A until the next time it returns to the depot / toggle manual and back to auto.
Changing network signal for providers and requesters doesn't work too. I am guessing you missed a has_changed toggle in this line.
Another related behaviour (probably intended? For changing network signal mid-delivery):
1. Set up stations (depot, provider, request) for network A.
2. Trigger a delivery, while the train is delivering, change depot to network B
3. Train will not bypass the depot for another delivery (I observed that the train is still under the signal-A key in available_trains table)
After fixing has_changed flag, the train continues with its delivery for network A until it returns to depot and convert into a network B train. Not sure which behaviour is intended.
P/S: please change the title, it is not limited to depot only
