Zombie Speed "Random" setting resets to "Fast Shamblers" (Build 42.13.1 MP)

[unkempt basin]

Version: Build 42.13.1 (Multiplayer)

Mode: Dedicated Server / Host MP

Mods: None (Clean install tested)

Platform: Steam / PC

Description: I am unable to set the Zombie Speed to "Random" in the Multiplayer server settings. Whenever I select "Random" and save, the setting immediately reverts to "Fast Shamblers" upon re-checking.

Reproduction Steps:

Open Server Settings (Sandbox).

Set Zombie Speed to "Random".

Save the settings and close the menu.

Re-open the settings; the speed has reverted to "Fast Shamblers".

Even manually editing _SandboxVars.lua to Speed = 4 does not work; the game still forces all zombies to be Fast Shamblers in-game.

Expected Result: Zombies should have a mix of speeds (Shamblers, Fast Shamblers, and Sprinters) as per the "Random" setting and the Sprinter percentage defined.

Actual Result: All zombies are forced to "Fast Shamblers" regardless of the "Random" selection or manual file edits.

[faint sun]

Sprinter do not work "vanilla" on multiplayer
so when you choose "random" (as this setting include "Sprinter") you end up with a default settings
not a bug. it's in the code since MP exist afaik

[odd umbra]

They are currently disabled for performance reasons