Just had the same thing happen to me the other day. Had the 0450 for several months, pulled it out of my pocket and tried to flip it and it was locked up tight. About 2 seconds after my intiial WTF??? I noticed the clip was on the lockbar. Now, I asked myself, we've got two screws here holding this clip, how the heck could the dang thing travel like that? Oh, because the holes in the clip are oversized. Seriously, ZT??? You have an awesome knife, great blade shape, great steel, great flipping action, and you skimp out on...the clip?!?
Back at ZT design central when... 2015?:
"Aw, crap, we got a problem with those 0450s."
"What?
"The holes on the clip are the wrong size."
"Meaning..."
"The clip won't stay put, it'll wobble."
"Well, that's pretty stupid."
"Yeah, somebody, screwed up. Sorry, we'll have to do another run of clips."
"*#$( it! Just use 'em. Nobody likes our clips anyway."
"Uh...ok, but..."
And you still haven't fixed it???
Well, I'll order another clip of some sort and/or get some better screws, but really, this shouldn't happen. This is like irksome issue No. 3 with the 0450 design for me, but the only one that is actually causing me a problem.
Wonder if the 0460 suffers from the same inattention to detail?