Copper veins generate ores with stone variants on the deepslate layer

Copper veins generate copper ores with stone variants on deepslate layer. Also, copper veins shouldn’t generate under 0y level. I took two screenshots for comparison from 26.2 and 26.3.

Seed: -5872216945006338038

Coords: /execute in minecraft:overworld run tp @s 96.83 -46.47 -134.75 189.50 43.88