@ytc1 that's the way it's been for decades - you can see the bug to document that in the man page for Solaris 9 back in 2002: https://illumos.org/opensolaris/bugdb/bug.html#!4622577
and that text is still in the 11.4 man page. Similar text is in the shadow(5) man page in the description of the *LK* value.
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