My 90002/90001 story.

[Raist]

sounds a lot like stalling packets, typically as a result of high utilization at a node on the way to SE or back. Internet congestion can seem completely random at times, but usually there is a pattern to the behavior, but some ISP's don't track things well enough and we have to prod them into researching issues. Have you researched the quality of your route to your game server? Tends to be a very common source of stability problems for the game, typically focused around the exchange into an ISP's routing partner or within that partner's path to Ormuco (SE's ISP).