Some of the Big Tex dealers that I have been to here in the North west , are all independent . They have their trailers hauled in by commercial flatbed trucks and There is were the problem usually occurs . Trailer is fine at Factory , Loaded By Factory and still fine , strapped down under observation by Factory and still O.K. . But some were in transit , driver retightens straps , chains , whatever and things start going amuck .
Why I say this is that the Dealer I bought my Big Tex had the same issue's until He started using His own trucks to haul trailers back to His sales lot , ( He also runs a 5 Truck Fleet of Flatbeds ) . Once He did that , All His trailers are like straight from the Factory line look upon arrival .
I Think You will find many type's of issue's with any brand , if their trailers are delivered by other than company trucks from factory .
Fred H.