I don't even know how to debug this to give you more details.. with 1.15.2-1.3 mining ores gives the smelting outputs instead of the 'raw' ore block.. rolled back to 1.15.2-1.2-beta-4 and I have no issues :)).. config files untouched..

here is the instance, it has a new world i've created to test it again: ** removed as its not needed anymore **

Can confirm the above issue using forge-311.45 and the latest 311.47

Could be an Issue with the Infernum Pickaxe again. Seems like vanilla pickaxes (enchanted or not), have its special smelting ability now. Curiously though, the golden pickaxe drops nothing but I'm not sure if that is related.

it's even breaking the new pickaxes from other mods and negates silktouch, all ores also involved, Even from extra mods

Fixed in 1.15.2-1.3.1. Thank you for reporting :)