I swapped out the Iron ore with Netherrack and it is now producing Nether brick ingots. Not sure what caused this issue, however it seems to have resolved itself.
I don't know if it matters but I realized I forgot to mention that it is occurring on a Survival Multi-Player server.
Yes, because I swapped out the Netherrack for Iron ore and it is producing ingots.
I swapped out the Iron ore with Netherrack and it is now producing Nether brick ingots. Not sure what caused this issue, however it seems to have resolved itself.