It sucks to have issue on a new rig. I hate to say it, but every new RV I have ever bought had similar issues. I spent the first season working all the bugs out of the units myself. P traps on every sink werent tight, and dripped... pex fittings were loose and leaked. Found hydraulic lines that were loose. Wiring that was not tight, and intermittent. Stupid plastic ESV failed on every one of our units and the black tank flush leaked when used.
Unlike buying an car, Rvs are hand built and slapped together as fast as possible. You need to be very hands on , and handy. Having dealers take care of even simple stuff is beyond frustrating, and always slow!