Factorio Forums

Hello,

I'm ran into weird behavior while trying to build a vanilla LTN-like system with combinators, I hoped that someone knows why it behaves the way it does.

I attached a save, it's paused and can be ticked manually. After 4 ticks, the combinator (marked in the screenshot) should lose its "rocket fuel" signal, but it does not. If you check the power pole to its left, that doesn't have a "rocket fuel" signal anymore. Why does the combinator still have it as input? I thought that once the powerpole doesn't show it anymore, the combinator shouldn't have it either.

What's really weird, when you disconnect the red wire from the combinator it works as expected. I mean the logic breaks, but the combinator loses the "rocket fuel" signal at the same time as the power pole.

Sorry if it's a bit hard to understand, I tried my best explaining.
To be it seems like a bug, but maybe my understanding is simply wrong.

Save file to reproduce:

The signal from the green wire is gone, but the red wire connected to the output of the top left "+" arithmetic combinator below the locomotive supplies the offending signal.

Ugh, of course it's me overlooking something obvious... Thank you!