(Instance/BlackTemple): Summoned Ashtongue behavior when instance is empty of players is incorrect.

[heyitsbench]

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Current Behaviour

Currently, when the instance is empty of players during the Shade of Akama fight, any Ashtongue Elementalists, Rogues, or Spiritbinders will simply despawn after spawning.

Expected Blizzlike Behaviour

When their threat list is initially cleared (i.e. when the wipe fully happens) any aforementioned Ashtongue creatures should despawn, but any Ashtongue creature spawned thereafter should stay spawned but stand still where they were spawned.

Source

Retail PTR

Steps to reproduce the problem

1. .tele bt
2. Make your way to the Shade of Akama.
3. Allow various Ashtongue creatures to accumulate. (Optionally give Akama an uber heal spell)
4. Die.
5. Observe that they will not be allowed to stay spawned going forward.

Extra Notes

A bit more context around this issue can be found here: https://github.com/azerothcore/azerothcore-wotlk/pull/20076

AC rev. hash/commit

529e9140323edeef916bd6a1b6c97e13aa38db08

Operating system

Windows 10 x64

Custom changes or Modules

mod-ptr-template