Discovery:

It seems that the foxes in my sweet berry farm are no longer harvesting the berries... this farm worked in previous snapshots.

What happened vs. What should have:

• The fox should have occasionally gone over to berry bushes and knocked the berries off of them as an item and reverted the plant to the green state with no berries
• The fox has no interactions with the berry bushes

Testing:

Foxes in enclosed areas can't harvest berry bushes.

• It doesn't matter whether the fox is in a large or 1x1 block area
• It doesn't matter whether the fox is inside the bush or one block above supported by a carpet
• It doesn't matter whether the fox 'trusts' the player or not
• It doesn't matter whether there is one fox or more than one
• Increasing the tick speed from 3 to 300 to 1000 to 3000 made no difference
• The distance between the player and the fox made no difference
• The biome made no difference

In all of these situations, the fox would not harvest berries.

Replication:

• Build a 1x1x1 chamber
• Put a sweet berry bush inside
• Put a fox inside
• Observe that the fox doesn't harvest berries

(Pictures of setup below)