[outages] pool.ntp.org

It seems like there may be some bad/broken NTP server in the pool.ntp.org revolver. When using that address we have seen numerous time sync failures over the last 24 hours. Changing to 0.north-America.pool.ntp.org the issue goes away. Has anyone else observed this in the last day? I have not been able to identify the failing IP in the resolver pool. We are in Pennsylvania USA.