WowAce

1x GetAuraDataByIndex(): Auras cannot be accessed when secret while tainted by 'Ace3'
Lua Taint: Ace3
[Blizzard_MawBuffs/Blizzard_MawBuffs.lua]:4: in function 'ShouldShowMawBuffs'
[Blizzard_ObjectiveTracker/Blizzard_ScenarioObjectiveTracker.lua]:187: in function 'LayoutContents'
[Blizzard_ObjectiveTracker/Blizzard_ObjectiveTrackerModule.lua]:147: in function 'Update'
[Blizzard_ObjectiveTracker/Blizzard_ObjectiveTrackerContainer.lua]:64: in function <...ectiveTracker/Blizzard_ObjectiveTrackerContainer.lua:49>
[tail call]: ?
[tail call]: ?
[Blizzard_SharedXML/MixinUtil.lua]:341: in function <Blizzard_SharedXML/MixinUtil.lua:340>

Locals:

as per https://github.com/GurliGebis/WoWAddon-BattlePetCompletionist/issues/158

it appears blizzard takes anything that touches the objective tracker or map listing display as a corruption per se when in M+ combat and other times they reuse the code formalized in shadowlands to show there.

note: that means this may not be ACE3, it could be whatever is using it in that scenario.