My wife and I play together and are very confused.

I am on a PC via Ethernet (Gladiator), she is on a PS3 via wifi (Archer).
Internet: Cox cable
Router: Apple Airport Extreme (not the most recent)

From her perspective, from time to time my character will stop moving. On her map, the dot representing me will move correctly. When I attack something, it appears to her that I am attacking at great distance, so my Glad is functioning normally except she can't see me.

This happens in or out of a dungeon. In groups, no one else has had a problem with me and she has not had a problem of anyone else being stuck. It does not matter if we are in combat, running around, etc.

Zoning or re-logging on temporarily fix it. Frequency example: the other night, we played for 2 hours without problem. This involved a dungeon, several very busy fates, and questing. Tonight we only played an hour and the problem happened 5 times.

Any and all thoughts are greatly appreciated.