It’s likely missing a window weep hole cover on the passenger side. They can fall off and even one missing sounds like an open vent window.
They aren’t expensive to buy online and snap into place. I put silicone sealer on the edges of mine to keep then from disappearing. Put a strong piece of Gorilla tape or similar on the opening as a temporary fix.
There are lots of threads on this. Here’s an old one:
https://www.winnieowners.com/forums/...em-233857.html
Look for a row of plastic covers below the driver’s and passenger’s window. You’ll see one or more missing.