It could be bad routing from SingTel, or Server issue, or Heya/SingTel 4G issue. You may have to carry further debug by yourself.
Latency to the server is not good, from SingTel SIM Only here (5G SA connection with fast local speed), using Poco X7 Pro.
Using Termux app.
Bash:
~ $ ping -c 4 rapidgators.net
PING rapidgators.net (142.44.149.196) 56(84) bytes of data.
64 bytes from reseller.re (142.44.149.196): icmp_seq=1 ttl=33 time=281 ms
64 bytes from reseller.re (142.44.149.196): icmp_seq=2 ttl=33 time=262 ms
64 bytes from reseller.re (142.44.149.196): icmp_seq=3 ttl=33 time=258 ms
64 bytes from reseller.re (142.44.149.196): icmp_seq=4 ttl=33 time=255 ms
--- rapidgators.net ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3007ms
rtt min/avg/max/mdev = 255.929/264.416/281.026/9.847 ms
~ $ ping -c 4 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=113 time=25.4 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=113 time=24.9 ms
64 bytes from 8.8.8.8: icmp_seq=3 ttl=113 time=20.5 ms
64 bytes from 8.8.8.8: icmp_seq=4 ttl=113 time=37.7 ms
--- 8.8.8.8 ping statistics ---
4 packets transmitted, 4 received, 0% packet loss, time 3007ms
rtt min/avg/max/mdev = 20.534/27.188/37.785/6.414 ms
OOkla local speed is fast on SingTel 5G.
OOkla local speed is pretty slow here if I force the phone to use SingTel 4G LTE. Signal strength is pretty good but speed is slow