When you break a Dark Oak Log with only a Silk Touch Diamond Axe, it becomes a regular oak log with no texture. Then when you place the broken log down, it turns back into a Dark Oak Log.
Linked issues
is duplicated by 5
MC-58021
The dark oak log item is missing texture when broke by enchanted diamond axe
Resolved
MC-58211
The texture for Dark Oak is missing
Resolved
MC-58247
Breaking dark oak log with axe show placeholder texture
Resolved
MC-58267
SMP Acacia and Dark Oak Trees Drop Oak wood with a missing texture when broken with a axe and pick
Resolved
MC-58455
Dark Oak Wood wrong textures and wont act like regular wood
Resolved
Cannot confirm. See screenshots.