Water leak under the Cab

Good morning, I have a Chateau 28z. And as I moved the RV on the storage parking lot where the grade changes. All of the sudden I see water coming down the long horizontal inverted half cane, under the bullnose. Is this a working as gutter? o I have bigger issues. I always check the roof and all the joints around the RV for any gaps. I did seal the clearance lights yesterday which I found out that the light seals are a joke. But they are located much higher. If it is the case, then the water will travel inside the bullnose into that bottom connector?. Thank you in advance for any ideas or past experiences.
https://imgur.com/a6uukJT