Water leaks through obstacle Every time I try to hold water with a obstacle, it leaks out. Here is one example I have made.



The shape has no holes, and the water is partially contained but slowly leaks out. This has occurred every time I have tried this. What could the cause be?
Setting the obstacle's volume initialisation to shell seems to have fixed it 

 

I have no idea why this works if anyone knows why please add it to the comments.