Troubleshooting a leaking bunk window

[dalamarjj78]

My trailer is still winterized so I went outside today to do my routine check-up and noticed a new issue.

The bottom corner of the window blind for one of my bunk windows is brown and discolored. I climbed up and took a closer look and it seems I have (another) leak. I pulled up the mattress and noticed slight water markings on the plywood underneath that indicates it's gotten wet.

I didn't notice anything with the window from the inside so went outside to take a look. The only thing I noticed is that part of the window trim seems a bit "off". I took a photo and marked it in red (attached). This is the same corner where the blind got wet.

I could really use an expert opinion - does this look like it could be the issue? If so, is it an easy repair?

Or should I suck it up and order a whole new window?

I'm not under warranty (the trailer's 3 years old) and will attempt this repair myself as I have no plans on leaving it to sit at the dealership all summer for repairs.

Any input and suggestions on other things to check would be greatly appreciated!