During the Queen’s Jubilee Opening Ceremony, when the objective switches to defending Rox at various vantage points as she attempts to target the Mysterious Stranger, no Aetherblade thugs spawned at all. This didn’t block progress; I simply followed her to each vantage point and stood there until she moved to the next and the objective eventually completed.
The Aetherblade thugs were present at the previous objective (defending the Queen) and then they all just despawned and never reappeared at the defend Rox objective.
Approximate time: 11:00-ish PST Wed 08/07
Sanctum of Rall (NA).
IGN: Tyrra
Guild: Gaiscioch [GSCH]
Server: Sanctum of Rall (NA)