The things I wouldn't do in the name of science and also my dedication to BF.com and my brudahs in knife
OK, I just gloved up, the "no-cry" type which you buy for use in the kitchen or to use with Wicked-Edge (5th or 6th degree, I don't recall exactly but probably the lesser), started spine whacking on a thick piece of foam at first and when that didn't fail on me, I put a piece of towel on my wooden work bench and started whacking harder (no gutter minds here; remember this is for SCIENCE!) moving my hand up and down the handle! Nothing, nada! Then I started dickering with the blade applying spine to edge force to disengage the lock and still nada! Now, I would've applied a lot more force and pressure if I was wearing thick faux leather or something work gloves, what I did was no less than say a pineapple test.
Could it be that what you got and received is a weak faulty one? I still have a tad or stick or rather click, but I'm fine with this sample as it is.
Or, it could be something else entirely. 15 posts in 6 years all about lock slip on 2 knives.
TLDR? Quack, quack.