Nelo 550 beginner question

I've got a new Nelo 550, it's my first surfski. Overall I'm very happy with the boat, it handles well and is fun to ride. Still there's one thing that bothers me: After each ride I find about 1cm of water in the rudder compartment. The top lid seems to seal well, so I guess water comes in through the rudder shaft and drops into the compartment when the boat is upside down after a capsize (which still happens to me every now and then ,-))
My question: Is there a possibility that the water gets from the compartment into the hull through the holes of the rudder lines - or are these things further sealed and protected from inside? So far I haven't noticed anything but of course I can't see what's going on inside....

Is there a possibility that the water gets from the compartment into the hull through the holes of the rudder lines - or are these things further sealed and protected from inside?

They are sealed and there's no way water should get in through the rudder cable channels at either end.

It's not so relevant on skis that have dyneema all the way from rudder to pedal, but on most of my boats it's been steel cable and long ago I developed the habit of leaving the cover off the rudder box so that a) I can rinse that area off with fresh water and b) I can see if there are any corrosion issues.

But no, there's no issue from that little bit water getting into the rudder box area - but if it bothers you, just leave the cover off.