[2.0.23] Pumpjacks with extremely high mining productivity cannot output listed rate.

[MindHawk]

* What did you do?
I'm playing a lategame Space Age save with mining productivity 589+. We're mining sulfuric acid on Vulcanus with pumpjacks.
* What happened?
Despite theoretically producing 50k sulfuric acid per second, the majority of the time the pumpjack is idle while the pipe is nearly empty. Our pumpjack is limited on the 6k/s hard limit - the pumpjack only has one fluid output. The pump is rapidly cycling between "Target Full" and "Working".

factorio_Es2IenMniP.mp4

(1.67 MiB) Downloaded 11 times

* What did you expect to happen instead?
Pumpjacks to be able to output their listed fluid per second with high mining productivity, or for this limit to be shown on the pumpjack.
* Does it happen always, once, or sometimes?
This always happens when a pumpjack produces enough fluid per second.

As an aside, while extremely high mining productivity also runs into issues with unloading fast enough for normal miners, it is not a hard limit - you can run dozens of trains past a single mining drill at this stage of the game, for example. (Our Nauvis base does this for stone)

Attached is both a video of the issue and a save of our game. The pumpjacks in question are in the top-right of our vulcanus base.

[raiguard]

Duplicate of 118644