以下から見て正しく固定IP化しましたか?(インスタンス側)
でなければ Aレコードには ALIAS 設定が入るはずですよ
nslookup leaptalent.com
nslookup leaptalent.com
Server: 210.188.224.11
Address: 210.188.224.11#53
Non-authoritative answer:
Name: leaptalent.com
Address: 13.228.211.120
ping 13.228.211.115-13.228.211.125
ping 13.228.211.115 -c 1 -W 1:1 packets transmitted, 0 received, 100% packet loss, time 0ms
ping 13.228.211.116 -c 1 -W 1:1 packets transmitted, 0 received, 100% packet loss, time 0ms
ping 13.228.211.117 -c 1 -W 1:1 packets transmitted, 0 received, 100% packet loss, time 0ms
ping 13.228.211.118 -c 1 -W 1:1 packets transmitted, 0 received, 100% packet loss, time 0ms
ping 13.228.211.119 -c 1 -W 1:1 packets transmitted, 0 received, 100% packet loss, time 0ms
ping 13.228.211.120 -c 1 -W 1:1 packets transmitted, 0 received, 100% packet loss, time 0ms
ping 13.228.211.121 -c 1 -W 1:1 packets transmitted, 0 received, 100% packet loss, time 0ms
ping 13.228.211.122 -c 1 -W 1:1 packets transmitted, 0 received, 100% packet loss, time 0ms
ping 13.228.211.123 -c 1 -W 1:1 packets transmitted, 0 received, 100% packet loss, time 0ms
ping 13.228.211.124 -c 1 -W 1:--- 13.228.211.124 ping statistics ---
ping 13.228.211.125 -c 1 -W 1:1 packets transmitted, 0 received, 100% packet loss, time 0ms