Last 2-3 weeks (with severity of cadency increasing more and more) I have terrible lag/ping problem in WoW.
It goes randomly, hours and hours of my usual ±30ping, then sudden jump to 80-100 for few hours. Sometimes only the ping is higher, sometimes there is about 1% packet loss as well. Here and there (for example today when I wanted to raid) ping jumps to some crazy numbers like 200+, with packet loss over 5%. Lasts tens of minutes, then stabilize again (either on ±30 or 80-100) and is usually fine for few hours from there.
The higher 80-100 windows happens usually late afternoon and evening (night/late nigher/early morning is fine around 30 usually), the extreme latency spikes with high packets loss I was monitoring any time of the day.
When it happens, all the other services/games are fine, I can play CoD with 15ping, any other nonblizzard game on usual 15-40 on eu servers. Zero packet loss. Only eu.battle.net and especially wow eu servers have the issue. I have seen increased latency (50-60) on overwatch as well just as a quick test, but I dont really play it so I dont know what it looks like “normally”. Only other blizzard game I play regularly nowdays are the ones where ping is not shown or is irrelevant so I cant speak for those.
Vodafone Czechia (Prague).