Stone blocks and stone stairs are insta-mined when the player has the effect haste 2 from a beacon, stone slabs however are not insta-mined.
Expected result, insta-mine stone slabs with haste 2 effect
Actual result, slower mine speed for stone slabs, even with haste 2 effect
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We're actually already tracking this issue in MC-53641, so this ticket is being resolved and linked as a duplicate.
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