The Extended Potion of Freezing cannot be brewed by adding Redstone Dust to a regular Potion of Freezing. This behavior is inconsistent with standard brewing mechanics in both Bedrock and Java Editions, where most base potions can be extended using Redstone Dust.
Steps to reproduce:
Create a new world and enable the experimental feature "Drop 4 of 2026".
Obtain a Potion of Freezing (brewed by combining an Awkward Potion with an Ice Ball).
Place a Brewing Stand with fuel (Blaze Powder).
Place the Potion of Freezing in the bottom slot.
Place Redstone Dust in the top slot.
Observe that the brewing process does not start.
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