Lead in Solid Oxidizer?!

hm.. do you activate yellow or red alarm? I think when activate one of them, and the duplicant is carrying more than one item, the item he is also carrying goes along to the machine, I saw someone saying something like that but I don't remember who
edit: my theory> I think your duplicants were carrying lead to fix these gantries, so you turn on the yellow alarm so the duplicants get oxylite to refuel the solid oxylite tank

 

Edited December 14, 2019 by coheru
my theory about what happens

I had a similar experience. For me it was something like Granite (or some other raw mat.) in a Rust Deoxidizer.

And I had not used any alert on it.

I had an egg in an incubator turn into 1kg of rock on save load. It wasn't even egg shaped! I'd understand if they put the egg shaped rock artifact in there