The ping to HE's Singapore tunnelbroker server has been really inconsistent for the past few days. MTR results showed the lag spike to be at the tunnelbroker server, so far it doesn't seem like it's an issue with my ISP but I'm not ruling it out yet.
Running mtr -w -c 15 -i 1 216.218.221.42:
Start: 2023-08-25T21:32:34+0800
HOST: Loss% Snt Last Avg Best Wrst StDev
1.|-- 1.64.245.49.unknown.m1.com.sg 0.0% 15 2.4 2.5 2.4 2.7 0.1
2.|-- 204.246.65.202.unknown.m1.com.sg 0.0% 15 2.7 4.1 2.3 11.1 3.3
3.|-- 205.246.65.202.unknown.m1.com.sg 0.0% 15 2.4 3.4 2.1 13.1 2.8
4.|-- 162.246.65.202.unknown.m1.com.sg 0.0% 15 3.1 3.3 2.5 4.9 0.6
5.|-- hurricane-electric.sgix.sg 93.3% 15 4.1 4.1 4.1 4.1 0.0
6.|-- tserv1.sin1.he.net 6.7% 15 172.3 172.7 124.5 220.2 24.0
(https://i.imgur.com/VEMMaNU.png)
Edit:
MTR when ping to the tunnelbroker server isn't spiking
Running mtr -w -c 20 -i 1 216.218.221.42:
Start: 2023-08-26T01:51:56+0800
HOST: Loss% Snt Last Avg Best Wrst StDev
1.|-- 1.64.245.49.unknown.m1.com.sg 0.0% 20 2.6 2.6 2.4 2.9 0.1
2.|-- 204.246.65.202.unknown.m1.com.sg 0.0% 20 2.5 3.5 2.4 9.8 2.1
3.|-- 205.246.65.202.unknown.m1.com.sg 0.0% 20 3.0 3.3 1.8 17.0 3.2
4.|-- 162.246.65.202.unknown.m1.com.sg 0.0% 20 3.3 4.3 2.9 18.2 3.7
5.|-- hurricane-electric.sgix.sg 95.0% 20 5.8 5.8 5.8 5.8 0.0
6.|-- tserv1.sin1.he.net 0.0% 20 3.0 3.8 2.5 9.0 1.8