Problem: 900002 error random, but on average, once per hour, sometimes 2 or 3.

Occurs: Inside battle instances (Sephirot Extreme, Level 60 dungeons)
-In towns (Limsa Lominsa Lower, Mist)

When: Issues started after 3.25 patch release.

Prior History: I moved in and had no issues for the first week and a half, and now it happens almost all of the time.

Further information:
My average ping to the server is 70ms to 110ms
Charter Communications - ISP
Connection speeds: 100mb DL / 4mb UL
Type: Cable, apartment

Using network monitoring software, I can confirm my ping to the game server will spike to 300, 500, and as high as 700ms for 1 to 4 seconds, just long enough to cause my connection to drop from the server(s).