New trailer came off hitch!!

I always raise the trailer to try and force it to disconnect.. kind of like a fifth wheel pull-test.

Grit dog wrote:
^No, I never do that, but your process could be replaced with simply bending down and looking at the hitch to see that it’s set all the way down if you want verification.

Many years ago, when I had bumper pull trailers, I lifted my hitch with the jack to raise the "A" frame high enough to ease the latching of the tension bars. Must have done this a couple of hundred times, over the years, and never had a problem.