Please include as much of the following information as possible to help me fix the bug:

Brief Description of Bug

Please include a brief description of the bug, including what you were doing, and when it occurred.

Whenever I receive an achievement of any kind, no matter the time and place, my interface lags out for a few seconds.

Steps to Reproduce

Include the steps I would need to follow to reproduce the bug.

Acquire an achievement with Auctionator loaded.

Loaded Addons

Include a list of addons you were running at the time this bug occurred.

Auctionator
AzeriteTooltip
Bagnon
Bartender
Battle Pet BreedID
BigWigs
BugGrabber
BugSack
Bulk Buy
ChampionCommander
Chatter
Details
Encounter Journal Saved Instances
Exorsus Raid Tools
GottaGoFast (updated?)
HandyNotes (with BfA module)
Leatrix Plus
Lib Shared Media
LittleWigs
Minimap Button Frame
Pawn
Personal Loot Helper
Pokemon Trainer
Postal
PremadeAutoAccept
Rarity
Shadowed Unit Frames
SharedMedia
SimPermut
Simulationcraft
TalkLess
The Undermine Journal
Threat Plates
TomTom
WeakAuras 2
World Quests List
Wowhead Looter

I do not believe this list is helpful, as I have seen people with completely different addon loadouts but also having auctionator, also having this issue, but I am including it because it was asked for.

Back Trace (LUA Error Output)

You can get this through the use of !BugGrabber and BugSack addons.

BugSack did not acquire an error of any kind, which was the puzzling part, or I would have been able to isolate this issue much earlier. I always assumed it was configuration related or Blizzard code related but when it did not go away, I disabled addons and acquired various achievements, and cross-referenced my addon list with others having the issue. Disabling Auctionator before acquiring one worked perfectly.