Critical Instant reaction smoke only ever affects one tile

[Noah Buttes]

The smoke effect made by mixing sugar, potassium, and phosphorous without stabilizer only applies the smoke to the tile on which the reaction takes place.
Steps to reproduce:

1. Find a watering can
   
2. Add 30 units of carbon to the watering can
   
3. Add 30 units each of potassium and phosphorous to the can
   
4. Add 30 units of sugar to the can
   
5. Observe that dirt only appears on the initial tile of the reaction
   
6. Try the same steps again, but use stabilized smoke powder instead of instant-acting yeast
   
7. Observe that the stabilized smoke powder has a more appropriate distribution of dirt, although it does seem to fit the contours of the room rather than forming a square like it used to. This may be a separate bug or it might be a feature, I'm unsure.
   

Edit: stabilized smoke powder appears to be inconsistent as well, although the instant reaction is consistently broken.

I'm upgrading this to critical because those are the only two ways of generating smoke and they both appear to be entirely broken and/or mostly broken