I also have latency issues past 5-6 days, which begin/getting fixed each time I login on server/changing location, and remain for the whole game session. Like local ping 50, global 500 for an hour. Logout/login and its 50 50… or still the same. And Im not alone who complained about that on forums.
One of traceroutes:
WinMTR StatisticsWinMTR statistics
| Host | % | Sent | Recv | Best | Avrg | Wrst | Last |
| host91-195-130-249.fixed.trytek.ru | 0 | 461 | 461 | 0 | 0 | 0 | 0 |
| No response from host | 100 | 92 | 0 | 0 | 0 | 0 | 0 |
| host91-195-131-129.fixed.trytek.ru | 0 | 460 | 460 | 0 | 2 | 64 | 0 |
| host91-195-131-78.fixed.trytek.ru | 0 | 461 | 461 | 0 | 2 | 62 | 0 |
| msk-zoo-b2-ae4-vlan2303.fiord.net | 0 | 460 | 460 | 3 | 3 | 35 | 3 |
| msk-m9-b3-ae10-vlan1299.fiord.net | 0 | 459 | 459 | 3 | 3 | 61 | 3 |
| ams-nik-b1-ae10-vlan535.fiord.net | 0 | 461 | 461 | 37 | 37 | 81 | 37 |
| 80.249.208.83 | 0 | 460 | 460 | 38 | 42 | 272 | 39 |
| ae1-br02-eqam1.as57976.net | 5 | 381 | 365 | 49 | 280 | 3959 | 164 |
| 137.221.78.83 | 1 | 456 | 455 | 47 | 53 | 136 | 52 |
| 185.60.112.157 | 2 | 437 | 431 | 43 | 53 | 58 | 57 |
Today I tried to login on Tarren Mill from Argent Dawn, but it took too much time, so I cancelled it. I relaunched WoW, logged back on Argent Dawn and got disconnected with an error that my account is logged somewhere else. No doubts it happened because Tarren Mill login issue.