Leaky window frame ?

[Hernan Morillo]

After a very wet and windy couple of days at the Glen Brittle campsite in Skye, I’ve noticed a significant leak in my 2017 Cali Ocean..There is water getting in between the left side window frame (over the sink) and the body. The sliding window section does not appear to leak. The water drips can be seen behind the sink - dripping from bodywork- onto the middle and bottom shelves. The plumbing is all fine ( holding tank, hoses, sink drain and tap, all not leaking ). Any other reports of faulty / leaky windows in the forum? Grateful for any advice.
The photo shows the view with the slide-out cutlery tray removed.