Name of Internet Service Provider (ISP)
Vodafone Kabel Deutschland

Country of residence
Germany

When does the problem occur (e.g. only during specific times such as in the evenings?)
Evenings only.

Frequency of problem (e.g. every 2 minutes)
Lag spikes every few seconds, usually for a few seconds, sometimes longer.

Game content in which the issues occur (e.g. dungeons, trials, certain areas)
Everywhere but dungeons and trials appear to be worse.