The floodgate is skipping placing about half of the blocks/liquid it needs to place. The entire perimeter of the area it fills is not being placed as well as a checkerboard pattern. You can confirm the checkerboard with WAILA but the edge is clear to see as you will see moving liquid. I can confirm that this does not happen with BC 7.1.8 and BC Compat 7.1.5. I downloaded those versions and everything floods correctly so the bug was introduced afterwards.

• Forge Version: 10.13.4.1558
• BuildCraft Version (Add Hash if from GitHub): 7.1.22, 7.1.23
• Any additional mods: none

To Reproduce
Steps to reproduce the behavior:

1. Load game with just BuildCraft and BC Compat
2. Dig a 5x5 inner dimension hole
3. Place floodgate down in a corner and connect it to a tank via a pipe
4. Fill tank with oil
5. Wait for it to flood