No ores generate in sulfur or cinnabar, greatly reducing the amount of ores in sulfur caves, which means that players will likely avoid this biome as it is terrible for mining.
This can be fixed the same way as MC-307933 (deepslate ores spawing in sulfur springs) by making ores generate in sulfur and cinnabar the like they do in tuff as of 26.3 snapshot 1, that is, making them deepslate ores if below y=0 and stone otherwise.
Thank you for your report!
We're tracking this issue in MC-307915, so this ticket is being resolved and linked as a Duplicate.
That ticket has already been resolved as Working as Intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
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