Recent days my server also faced similar problems, the score drops even under no load at all. Traceroute showed funny results:
Traceroute to 103.226.213.30
1 gw-b.develooper.com (207.171.7.3) AS7012 0.239 0.195
2 gi1-9.r01.lax2.phyber.com (207.171.30.13) AS7012 0.528 0.634
3 te0-1-0-7.r04.lax02.as7012.net (207.171.30.61) AS7012 0.949 0.971
4 hurricane-electric.as6939.any2ix.coresite.com (206.72.210.122) 0.653 0.606
5 100ge2-2.core1.lax1.he.net (72.52.92.121) AS6939 0.705 0.751
6 100ge12-1.core1.ash1.he.net (184.105.80.201) AS6939 65.373 65.384
7 100ge5-1.core2.ash1.he.net (72.52.92.226) AS6939 55.394 55.400
8 100ge8-1.core1.nyc5.he.net (184.105.81.149) AS6939 60.358 60.461
9 100ge14-1.core1.nyc6.he.net (72.52.92.101) AS6939 60.981 61.103
10 peer1.nyc6.flagtel.com (198.32.160.88) 65.722 65.744
11 xe-2-2-0.0.pjr02.nyc007.flagtel.com (85.95.25.150) AS15412 189.079 189.012
12 (85.95.27.142) AS15412 189.758
12 ae2.0.pjr03.lax002.flagtel.com (85.95.27.30) AS15412 188.985
13 (85.95.27.102) AS15412 199.689
13 xe-2-0-3.0.pjr03.wad001.flagtel.com (85.95.27.138) AS15412 161.130
14 xe-0-0-1.0.eji01.tpe001.flagtel.com (85.95.26.122) AS15412 187.128 197.687
15 (80.77.2.202) AS15412 201.332
15 (80.77.2.198) AS15412 189.264
16 * *
17 * *
18 (103.31.197.122) AS131584 187.454 197.929
19 (103.31.197.86) AS131584 195.139 201.213
20 252-213-226-103-static.chief.net.tw (103.226.213.252) AS131584 199.671 190.570
21 * *
22 * *
23 * *
24 * *
25 * *
26 * *
27 * *
28 * *
29 * *
30 * *
So my packet crossed the America continent for 2 times before crossing the Pacific… 