Obstacle in fluid sim seems to have invisible force field.

I’m trying to make a fluid sim where a simple box falls into water. The problem is however, that the water starts to react to the box object even before the box actually touches the water. Its as if it has an invisible boundary or force field around it. Needless to say, this is VERY annoying. Any ideas on how I can fix this?

Its important that the interaction between the box and the water are as precise as possible since Im intending to use that same setup with a much more complex object later, and I want the water be displaced and splash around the object realistically.