I upgraded my modpack to 1.15 ATM10. All my recipes were same for the crafting and i tried for the first time in new version to craft basic upgrade and im keep producing yellow dye for the synyhetic rubber recipe. I also tried steel mixer but i think it is a bug because im using what JEI tell me to do.

yes

That's because ATM tags sulfur as a yellow dye. You can get around this by locking your output slots.

Hmm then i should make another mixer just for this bc im using it for a lot of recipes with output of items?