Not sure if this is a bug, but Blackstone and blaze rods wont create a brewing stand, unlike its overworld counterpart.
MC-192017
Blackstone cant craft brewing stand
Resolved
Duplicate
0
Hi there!
This looks like a duplicate of MC-177904. This is an intentional feature, and you shouldn't expect it to be patched as a bug. You can suggest a change to this on the feedback website at https://feedback.minecraft.net/hc/en-us.