Shortest flow path of water attempts to go through blocks that can be waterlogged

When attempting to flow, water typically uses the shortest path if there is one, however this is currently considering waterloggable blocks as places it can attempt to flow into. This means that it will fail to flow at all if there are waterloggable blocks in the shortest path.

This only seems to affect sources and waterlogged blocks but not flowing water as the the latter two screenshots demonstrate.