The top of deepstone ores represent the texture of the side of normal deepstone rather than the new top texture introduced in 21w08a.
Linked issues
is duplicated by 5
MC-216745
Deepslate ores do not have unique top textures
Resolved
MC-216876
Deepslate ores don't have up and down deepslate textures
Resolved
MC-216982
the texture of ores in deepslate has no surrounding texture referring to the top texture of deep slate
Resolved
MC-229953
deepslate top is not correctly combined with deepslate ores
Resolved
MC-261293
Deepslate ores don't have a vertical texture.
Resolved
Attachments
Comments 2
This is likely WAI since MC-178125 is a similar issue and was resolved this way
Sachari
Can confirm.