Spoiled priority not working (apparently) on stack inserter

[DarkLordKelvin]

I have a stack inserter that I use to toss expiring biter eggs on my promethium ship so I don't get overrun. It is enabled by a countdown timer, and I just noticed that it doesn't respect the "spoiled first" priority that I have set (see image). No matter which options I select (including switching off the stack size limit), it always unloads the stack farthest down in the inventory list first. I was just watching it dump eggs with 15% remaining on the timer while there were eggs with only 7% remaining higher up in the inventory list.

I kinda doubt this is a bug, since someone surely would have noticed it before, but I don't think I have ever personally tested the correct operation of the spoiled first/fresh first inserter filter. I just set it and trusted that it worked correctly.

06-28-2026, 18-36-10.png (551.86 KiB) Viewed 164 times

Anyway, my questions are:
1) Am I making an obvious mistake somewhere, either in my assumptions about how the spoilage filter is supposed to work, or in the configuration shown in the attached image?
2) Has anyone else experienced a similar issue? I couldn't find anything in a forum search.

Thanks in advance for any help/advice.

-DLK

[jdrexler75]

Probably this: Re: [2.0.32] Inserter Spoiled Priority setting not respected when taking items from Cargo Landing Pad

[ichVII]

Also general advice: dont use a stack inserter for that. Even if it worked as intended, it would be left with up to 15 biter eggs in its hand as it does not swing without a full stack. There are some circuit automation to make it drop that last bit, but I dont quite know how.