That braided line will tend to stretch when it gets hot from the engine/turbo heat. It's all good and tight when cold. Then it will start to leak when it heats up and flexes. Can you move the hose like that up and down on the tube when its hot with the clamp as tight as you can get it without breaking it (using a glove of course

)? Try using a better quality clamp(Yes Nissans are just that way lol), or cut back some of the braided line then clamp it down with the rubber on the tube. I know A LOT of people with this issue including myself. I highly doubt that its the press fitting unless you can move the whole thing....
Hope this helps.
