Unbearable lag in multiple instances of Ultima Thule on Excalibur with many players

[CyclopsDragon]

Date & Time: All times
Frequency: Constant
World name: Excalibur
Area and coordinates: Ultima Thule (instances 1 and 3)

Steps:
1. Gather a large number of players in the zone (there are noticeable effects with 30+ players and even more noticeable effects with 60+ players, which is fairly standard for hunts and boss FATEs)
2. Have the players engage a target (for example, Chi)

At 30+ players, this causes significant latency which often delays actions by half a second or more. At 60+ players, this often causes actions to be delayed by 5+ seconds. In addition, when the hunt mark Fan Ail uses its Divebomb attack and disappears, it sometimes does not reappear and stays untargetable until it next uses the attack. This issue has been constant in i1 and i3 of the Excalibur world's Ultima Thule for multiple weeks now.

[Kaeli]

To add onto this, the issue has been ongoing since at least the 18th of November, when I recorded this video. https://www.twitch.tv/videos/1656690001