Unreleased Call of Duty: Vanguard map randomly appears in matches

An odd CoD: Vanguard glitch has made a previously unreleased map appear in multiplayer matches for some players.

Announcement: Call of Duty: Modern Warfare III and Call of Duty: Warzone Season 1. All You Need to Know

All Multiplayer Maps - Call of Duty: Vanguard Guide - IGN

Call of Duty season 4 begins next week with new maps and playlists - Polygon

Lights, Camera, Action! Welcome to Mayhem, a New Multiplayer Map Launching with Season Three of Call of Duty®: Vanguard

What time does the Call of Duty Warzone Pacific map release and Vanguard Season One detailed

7 changes I want to see for Call of Duty Modern Warfare 3

Glitches, Call of Duty Wiki

Let's get tactical -- Dive into the details in Call of Duty: Modern Warfare II & Warzone 2.0's breakdowns for Dome and Ashika Island — GAMINGTREND

Call of Duty: Vanguard will have a Zombies mode, made by Treyarch - Polygon

Lights, Camera, Action! Welcome to Mayhem, a New Multiplayer Map Launching with Season Three of Call of Duty®: Vanguard

Why isn't this map in the map rotation??? : r/modernwarfare

Modern Warfare II and Call of Duty Warzone Season 4: Release Date, New Map, and Operator, and Ranked Play - COD Tracker