Are you using a VPN?
No.
Are you using a wired or wireless connection?
Wired
What Platform are you using? (Steam/Windows/Mac/PS4 etc.)
Windows
Does the issue occur with one character or multiple characters?
Only on Elemental
How often does the issue occur?
Seems like it didn't happen for a few nights, but the it looks pretty bad this Sunday, 11 August.

Internet Service Provider:
MyRepublic
Region/State:
Singapore
All steps taken to resolve the issue:
Restart router and ONT, change DNS, switch datacenters.