Its true but only in certain states and only after 14 days of leave. It also appears that this only applies to 'Parental' leave as vesting continues like normal for 'Pregnancy' leave. I guess fathers and adoptive parents are taking a hit but mothers aren't. See [1] for details. It does look like this setup has the potential to screw over an employee if they have a vesting date in the last 3 weeks of December and take…
6 weeks of parental leave is not enough, as anyone who has cared for a newborn can attest. 3 months should be the bare minimum for both the mother and father.