[2.0.20] Overextened pipeline still fill tank

[maeks84]

I was making a wall of flamethrowers and realized that there was oil in the pipe that was overextended. I started playing around with it in a new world and realized that I could fill a storage tank over 1,000 tiles away from the source. I thought once a pipeline was overextended, the fluid would simply cease to flow? I did use infinity pipes as a source, but I did try using fluid I had stored in tanks as well. Anyway, not sure what else to say about it. I'll attach a save file and log...

[Theragus]

Can confirm this behavior, the pipeline seems to work for 1 tick pushing fluids into the pipeline before the fluid flow stops.
from what I can see this is even done every time a new entity is built into the pipeline, for example, if you build more tanks to 1 end of an already overextended pipeline it can draw from a tank at the complete opposite end despite the pipeline being overextended the whole time.
Even weirder, sometimes this process seems to duplicate fluids in the pipe or the tank, although I haven't been able to reproduce this consistently.