If these are intended changes, that's fine. But filing a bug to be sure.
Can no longer use Redstone to turn a tier-II potion into an extended potion (or to revert to base if no extended version exists).
Can no longer use Glowstone to turn an extended potion into a tier-II potion (or to revert to base if no tier-II version exists).
Can no longer make Potions of Weakness from Awkward, Mundane or Thick potions.
Can no longer make Potions of Weakness by adding fermented spider eye to Strength or Regeneration potions.
Can no longer place splash potions into a brewing stand (but they work fine if they're already in there).(seems to have been resolved as MC-85865)
Linked issues
is duplicated by 10
MC-85655
Cannot Place Splash Potions in Brewing Stand
Resolved
MC-87528
Fermented Spider Eye not brewing
Resolved
MC-89034
Brewing stand won't use fermented spider's eye as useable ingredient
Resolved
MC-90745
Can't produce weakness potion
Resolved
MC-92185
Unable to make potion of weakness
Resolved
Comments 9
Crossed out the bit about splash potions, since MC-85865 didn't get marked as a duplicate before Dinnerbone fixed it there.
@[Mod] redstonehelper: MC-84073 doesn't belong here. The recipe for potion of water breathing still exists and "works" (i.e. the brewing stand attempts to brew), there's just a bug that makes it somehow not produce the correct result.