Treyarch has released a new Call of Duty: Black Ops 4 update, introducing some highly-requested changes to Zombies including increased last zombie bleed-out time, increased XP earn rates for solo and two-player matches, and much more.
Patch notes are as follows:

General

Black Market

Black Market and Operation: First Strike now live on all platforms.

Resolved a delay in displaying Black Market reward images in the After Action Report.

Miscellaneous

General stability fixes and improvements across Multiplayer, Zombies, and Blackout.

Zombies

Gameplay

Doubled the bleed-out timer on the last zombie per round from 5 to 10 minutes.

Increased the XP earn rate in solo and 2-player matches.

Reduced frequency of Hellhounds that spawn on mixed rounds in Blood of the Dead and Classified.
Elixirs

Increased maximum unique Elixir usage per round from 3 to 4.

Decreased cooldown time on Common, Rare, Legendary, and Epic Elixirs.

Decreased effective time on Aftertaste Elixir.

Reduced effectiveness of Head Scan Elixir.

Increased cooldown time on Classic Elixirs to balance increased last zombie bleed-out time.

Adjusted cooldown for all Elixirs in Rush Mode.

Corrected the Elixir cooldown reduction effect granted by the Time Slip Perk.

Challenges

Resolved an issue preventing players from completing the ?Coming Through? Challenge.

Resolved an issue where the ?Up Close? and ?Death Slider? Prestigious Challenges would reward the same Calling Ca...