Crown doesn't immediately "pop out" when unscrewed?

[dannyp]

Noticed something interesting, though not necessarily odd: When I unscrew my Explorer crown, it doesn't "pop out" on its own when fully unscrewed. Instead, I have to turn it about a quarter turn clockwise (without applying any pressure, which would screw it back in) in order for it to "release" for setting/winding.

Is that by design? Just a quirk that "some do, some don't"? Some issue I should pay attention to?

FWIW, haven't noticed this on my OP.