Date & Time: November 15th (Since Patch 7.1)
Frequency: Continuous
World name: Excalibur / All Worlds
Character name: Peridot Grayflame
Retainer name: N/A
NPC name: N/A
Monster name: Ttokrrone / Mica The Magical Mu
Class/Level: Any level 100
Party or solo: Either
In-game time: Any
Area and coordinates: Shaaloani (22.5, 5.0) / Living Memory (37.3, 3.3)
Housing: N/A
Steps:
1. Complete the fate chains for the region. ("Serpentlord" fates for Shaaloani, "Mascot" fates for Living Memory)
2. Wait a few minutes after completion.
3. If the respawn timer is complete on server side, the fate will spawn. (Currently the fate will not spawn.)


Additional context and information:
The community at large has noted through manual reporting and data collection that these fates respawn 36-72 hours after a server maintenance or previous fate completion, and this has been consistent until 7.1.
With the launch of 7.1, we have seen zero occurrences of these dawntrail worldboss fates globally, across all data centers and all servers. As we have reached the 72 hour point where a spawn would be expected to have "capped" the timer range, I am submitting this bug report, as it appears that Ttokrrone and Mica can no longer spawn with this patch 7.1.