[0.17] scenario infinite madness

[XaLpHa89]

The following scenario is "Infinite Madness", starting in a small ring surrounded by an enemy stone ring used not to be overrun by the biter. At one point, the ring is opened to collect more raw materials. And of course, to push the biter back. By shooting down the biter you get coins, which can be exchanged in a GUI market.

In the second screenshot, the biter collect in one place and do not know what to do. Occasionally a biter breaks loose and runs to the entrance. In my opinion, everyone should do this.

In the third screenshot below you can see that the raw materials are mixed. Now my problem: why does the left ore producer work, but not the right? Both have approximately the same resources available. Except for the uranium ore, all ores should be mined.
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[boskid]

Not a bug.

Electric mining drill works by randomly choosing ore patch in range (one of 25 or less), then it mines 10 ore and changes to different patch. If electric mining drill hits uranium ore, it will wait for sulfuric acid input to begin mining. Most likely first miner missed uranium ore for some times when second one hit it and is waiting for sulfuric acid.

[darkfrei]

There's very good mod for this issue: https://mods.factorio.com/mod/NoFluidstoMineUranium