![Image](https://forums.factorio.com/images/ext/e66d29a11b211c7331be54daa57f7c58.jpg)
![Image](https://forums.factorio.com/images/ext/e14254eabf84292861da021f8351db00.jpg)
To the right is a nest where the biters come from. I think it's not related to the locomotive being FARL, as i managed to circle the nest with rails, change to a vanilla locomotive and it also switched to automode once it got stopped (the dark image is with a vanilla locomotive). Also FARL doesn't register a ontrainchangedstate event, nor does it change train.manualmode.
I don't know how automated trains react when stopped by biters but maybe this behaviour is also applied for manual controlled trains, forcing them into automode?
Savegame
FARL
To reproduce, simply load the save with the mod loaded and keep (slowly) driving towards the east. Sooner or later you'll be stopped and the No path message appears, indicating that you're now in automode.