Oh dammit, my bad, I actually forgot to reprogram that train, it was basically useless all the time
But IIRC this problem also affected some of my other lines... I'll check back on this thread once that should occur again.
Anyway, thanks for now

@Rseding91
From what I checked, the train is actually stopped. It actually would have been refueled earlier, I don't think it would completely run out of fuel before making one run between its stations.

@Loewchen
Done, you can get it from my Dropbox: https://www.dropbox.com/s/umgi3udcdwswuc5/AFS.zip

Hi Team,
since what I think was the last update of the game, I suddenly quite frequently encountered the problem with my trains running out of fuel on-track. Further checking back on this I found out that the inserters at the train stops that are supposed to refuel the trains with coal/solid fuel ...