[2.0.20] Items getting quality in underground belt

[bonob]

I have an underground belt carrying green and red circuits passing under a quality-module-bearing quality-module-producing assembler.
The red circuits passing on that belt sometimes get quality increase.

This happens under the quality module level 1 assembler here:

20241121-003215.png (318.53 KiB) Viewed 203 times

It seems to happen quite often, ~30 min maybe after I set this up and cleaned the output of the underground belt a few times, I have 7 uncommon red circuits and 3 rare red circuits coming from that source in my inventory. There's no possible "legitimate" source of quality red circuits anywhere in the base.

The bug reproduces well in this precise place as far as I can say. I tried to build a similar setup somewhere else to see if I could find out the triggering conditions, but failed to reproduce this way.

There's one uncommon red circuit now in the underground belt that was created this way shortly before the save I attach.


Edit: after a bit more experimentation, what I see is that the belt doesn't need to circulate, the same happens if I switch off the inserter pulling red circuits above the assembler. But now, the quality module level 1 assembler itself gets stuck due to wrong quality red circuits, which seems to mean they're "generated" or "stored" right at the beginning of the underground belt, possibly at the same time the assembler decides it's going to produce an uncommon or rare item.

[morsk]

It's 1 odd red circuit assembler making quality.

quality-red.png (1.84 MiB) Viewed 186 times

[Rseding91]

Thanks for the report however there is no bug here.

11-20-2024, 12-14-54.png (2.5 MiB) Viewed 185 times

[bonob]

Gosh, I certainly put these modules there without realizing

Sorry for the (hopefully small) waste of your time, and thanks morsk and Rseding91!