Summary: Lava and Water Mechanics are Ignored if the Water and Lava are next to each other but the lava or water is flowing downwards preventing obsidian or stone being formed making glitched water or lava generate across the world.
Steps to Reproduce:
Step 1: Load a World.
Step 2: Place Water or Lava flowing downwards.
Step 3: Place other Fluid.
Step 4: Repeat
Observed Results: Water and Lava Mechanics are ignored when one fluid is flowing downwards even if both fluids are right next to each other.
Expected Results: Water and Lava mechanics should be applied in this scenario to prevent Glitched Water and Lava being generated across the world.