MaxisPlease forward this to your NOC team!
I'm re-opening this topic because the issue crept back just days after getting resolved.
Had to bear with it through the entire CNY last week but I'm not going to allow this to slip anymore.
Are you aware Maxis that Equinix SG is the culprit here despite them denying it all these while? Will you allow them to play you backs again and again?
At first I really thought that it was a congestion issue but after using a local COMPETITOR ISP to MTR and ping the same source
speed.sg.m247.ro, I found its routes were very different.
Both sources were pinged and MTR tested at around 6PM 19/02 today so there's little variance in traffic peak times to prove it's due to congestion.
Pinging via Shinjiru (Using Time/GlobalTransit uplinks), I could maintained a steady 14ms ping to M247 Infra SG as below:

MTR results to M247 Infra SG(AS9009) via Shinjiru:

But at the same time when I use Maxis directly:

MTR results to M247 Infra SG(AS9009) via Maxis-Equinix SG:

Clearly as you can see Equinix is messing up your routes, Maxis. Please screw them real bad if you need to Maxis or better consider in long term getting rid of them in favor of SGIX which other Malaysian ISPs have already made that decision.
Also DO SERIOUSLY CONSIDER peering with M247 Infrastructure (AS9009).
Currently the other Malaysian telcos which have already peered with them include:
TM
Global Transit
Time dComWhen are you going to join them to make the right move?