When a wooden gate is placed over a campfire with hay bale underneath, smoke clouds stack under the gate.
In the screen there are 4 versions, from left to right.
hay bale + campfire + 2 gates on top.
hay bale + campfire + 1 gate on top.
campfire + 1 gate.
campfire +2 gates.
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Comments 4
Smoke particles moving through the bottom fence gate is WAI based off of MC-141907, and the particles moving through the top-most fence gate would duplicate MC-142131. The particles are not getting stuck inside the bottom gate, but instead are getting stuck beneath the top gate (the ones that make it "through" the block only do so because they are spawned off to the side, and never collide with the block in the first place).
Can confirm in 20w49a.