1.14.4 Error on Fire Block

The FireBlock in Forge ist different in function to the Fire Block in Vanilla.

Details: In Vanilla wenn a Block Catch Fire the Fire will replaced only an Air Blocks on Top of burning Material.
In forge (forge-1.14.4-28.0.100)  the Fire will replace the burning Material.
In this Case Catching fire will not work correctly for  Burning Blocks ( In my Case on Oil).

Some Program Details:

In Function:  public void tick ...

TryCatchFire will be called:

this.tryCatchFire(worldIn, pos.east(), 300 + k, random, i, Direction.WEST);
            this.tryCatchFire(worldIn, pos.west(), 300 + k, random, i, Direction.EAST);
            this.tryCatchFire(worldIn, pos.down(), 250 + k, random, i, Direction.UP);
            this.tryCatchFire(worldIn, pos.up(), 250 + k, random, i, Direction.DOWN);
            this.tryCatchFire(worldIn, pos.north(), 300 + k, random, i, Direction.SOUTH);
            this.tryCatchFire(worldIn, pos.south(), 300 + k, random, i, Direction.NORTH);

In TryCatchFire Fire the Int i will be Filled with Flamability of this Block  and then te block will replaced with the fire Block;

   private void tryCatchFire(World worldIn, BlockPos pos, int chance, Random random, int age, Direction face) {
      int i = worldIn.getBlockState(pos).getFlammability(worldIn, pos, face);
      if (random.nextInt(chance) < i) {
         BlockState blockstate = worldIn.getBlockState(pos);
         if (random.nextInt(age + 10) < 5 && !worldIn.isRainingAt(pos)) {
            int j = Math.min(age + random.nextInt(5) / 4, 15);
            worldIn.setBlockState(pos, this.getStateForPlacement(worldIn, pos).with(AGE, Integer.valueOf(j)), 3);
         } else {
            worldIn.removeBlock(pos, false);
         }

In get Flamability, the Direction is ignored:

See IForgeBlockStatre 

    default int getFlammability(IBlockReader world, BlockPos pos, Direction face)
    {
        return getBlockState().getBlock().getFlammability(getBlockState(), world, pos, face);
    }

And IForgeBlock

    default int getFlammability(BlockState state, IBlockReader world, BlockPos pos, Direction face)
    {
        return ((FireBlock)Blocks.FIRE).func_220274_q(state);
    }

To Correct Problem it rmay be nessesary to insert 2 Changes:

in In TryCatchFire it might be helpfully to Check the Block for Place a Fire must be an Air Block:

   private void tryCatchFire(World worldIn, BlockPos pos, int chance, Random random, int age, Direction face) {
     if (! worldIn.getBlockState(pos).isAir() return;
    int i = worldIn.getBlockState(pos).getFlammability(worldIn, pos, face);

in IForgeBlock Direction may be used: I Downt know if this function will be called elsewhere. So it might be nessesary to allow use direction null

    default int getFlammability(BlockState state, IBlockReader world, BlockPos pos, Direction face)
    {

         if (face == null)
              return ((FireBlock)Blocks.FIRE).func_220274_q(state);

         Blockstate,blockstate = world.getBlockState(pos.offset(face));

         return ((FireBlock)Blocks.FIRE).func_220274_q(blockstate);
    }