Mine also received its first extremely annoying mark over the weekend.
I always back up to and line up my car trailer by myself using a mixture of my brain and the backup sensors. Not once have I had an issue.
Anyway, this time a mate "helped", and was in such a tither after about not getting it right after five attempts he guided the trailer right into my rear bumper, about three inches to the right of the hitch! LOL
Needless to say my eye diverts straight to the spot every time I walk up to the Jeep now