When biters attack trains with spit, which causes the AoE/DoT effect on the rail, it also causes biters to attack the affected rails.
It seems that when something gets hit with the spit, it's gets marked as an hostile entity to biters.
[Oxyd] [0.17.3] Biters attacking rails after spitting on them
Re: [Oxyd] [0.17.3] Biters attacking rails after spitting on them
I can't reproduce that. They attack the train, but leave the rails alone, as they should.
Can you make a save that reproduces this issue?
Can you make a save that reproduces this issue?