Name of your Internet Service Provider (ISP): Comcast Xfinity
Ticket or reference number from your ISP: None, they said it was not a problem on their side.
State/Country: MA, USA
Date/Time (When did the issue start happening, at what specific times does this issue arise, if any.): Usually begins around 9:15pm EST to about 11:15pm EST
Frequency (How often does the issue occur?): Seems to be every night. Lots of dropped packets making working with mechanics in boss fights very hard. People in the overworld "catch up" too, so it really diminishes the overall experience of the game.
Content (Which content were you playing in-game when the issue occurred?): Overworld, instances, PvP, Gold Saucer
Which in-game World were you playing on when the issue occurred?: Leviathan