Name of Internet Service Provider (ISP)
TMnet Unifi

Country of residence
Malaysia

Reference number from your ISP, if you have raised this matter with them
N/A, didn't raise a matter with them as this never happened before the 3.1 updates. Post 3.1 update this starting to happen and still persisting even after changing the modem/router/etc. Thought this will be fixed on 3.15 or the subsequent hotfixes but the lag spike still there.

When does the problem occur (e.g. only during specific times such as in the evenings?)
Lag spikes most of the time, more frequent during peak hours


Frequency of problem (e.g. every 2 minutes)
About every 3-5 minutes and spikes for a couple of seconds everytime

Game content in which the issues occur (e.g. dungeons, trials, certain areas)
Mostly in instances and dungeons where it can be easily found occurring, outside in towns and non-combat area lags too but not as frequent.