pool.ntp.casjay.social has no SRV records.
Question and response
Question
dig pool.ntp.casjay.social. SRV
Answer
pool.ntp.casjay.social. 5 CNAME casjay.pool.ntp.org.
Authority
pool.ntp.org. 1300 SOA f.ntpns.org. hostmaster.pool.ntp.org. 1772935286 5400 5400 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0