Quest Objects missing from Heroic Shadow Labyrinth

[dewmguy]

Description:
www.wowhead.com/quest=10091/the-soul-devices
http://www.wowhead.com/quest=10094/the-codex-of-blood

Current behaviour:
There are no Soul Device objects in Heroic Shadow Labyrinth

Expected behaviour:
Screenshots of Game Objects missing from Heroic that are available on Normal difficulty:

Soul Devices

Codex of Blood

Branch(es): 3.3.5

TC rev. hash/commit: b9b667f

TDB version: 335.63

Operating system: Windows 10

[offl]

#21082
It's a generic issue.