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.

Game bug or my videocard is broken? This rainbow appears from time to time on random maps in specific places and stays there until the end of the round. : r/blackopscoldwar

It's Anybody's Game in Season 03 of Call of Duty®: Modern Warfare® II and Call of Duty®: Warzone™ 2.0, Launching April 12

Call of Duty Vanguard: How to Fix the Most Common Bugs and Glitches

Call of Duty: Modern Warfare II review: an uneven sequel

Live Gameplay Being Shown For Everything Except Zombies?? I hope it's not a Vanguard Zombies situation : r/CODZombies

Call of Duty Vanguard map exploit makes players impossible to kill - Dexerto

Call Of Duty: Vanguard' Review: The Good, The Bad, And The Zombies

Call of Duty: Vanguard' Announces Map List

Call of Duty Warzone 2: Release date, loadouts, gameplay changes and new map - Mirror Online