holy crap im an idiot, i even went through research quickly and somehow missed it, thanks a million

14.22 running and i cant figure out whats going on when i drop in iron plates to be smelted into steel i get this, if i manually drop it in and if i try with a conveyor/insertor... it used to work in my old save but ever since i started a new game it doesnt work, i have reinstalled 3 times, didn't ...