Australian servers used for SG server ranked matches

Currently all players playing on Singapore servers who are Diamond 4 and above/have a D4 and above squad mate are connected to Australian servers without fail.

I know this because Australian servers are the only servers where I get a steady 150~ ping, I also regularly play with two friends, one who lives in Singapore like me and one who lives in Australia and surprise surprise he does not have 150~ms ping when playing with me.

This has been happening since the launch of S14, would love to play higher rank games on an actually REASONABLE PING instead of constantly dreading ranking back up to D4.