Bug: Liquids will flow into repairing blocks and replace them.

Liquids like lava and water etc will flow into repairing blocks and replace them. This is really bad since people using lava moats for example or decorative / automotive needed water sources will have to repair their things manually after an invasion if for example a miner dug into the source or if a creeper exploded making way for a large breach of the liquid spilling out.

Liquids should not be able to pass through these blocks is there a way to make liquids (source and flowing blocks) think that the red framed repairing blocks are solid blocks but keep it so that players and mobs can walk trough?