Onyxia Searing Gorge Lockboxes PROBLEM

Onyxia Server, Searing Gorge - The Slag Pit (Downstairs). Location with 200-225 skill lockboxes. Lockboxes don't spawn at all (respawn timers - may be many hours). Respawn timer here should be 5min, as like it was in original classic WoW (2019release).

Onyxia Server. No lockbox : https://imgur.com/a/TKvzcJd

How it should be (WoW Classic) : https://imgur.com/a/d6nH5iO

Onyxia IS NOT based on WotLK classic. Timers should be based on WoW 1.x.x version. If there's difference between Onyxia and 1.x.x timers, then make a report.