Working as Designed Wall of Flesh not despawning after dying

[Papita con Puré]

Steam or GOG

Steam

Single Player/Multiplayer

Single

Operating System

Windows 7

Terraria Version

1.4.0

Controls Used

Keyboard/Mouse

Summary: I'm playing on master mode, after getting killed by the WoF I could still see the heathbar from my home and see the boss icon in the map, moving. I think it's just a minor bug tho.
Details about my death (maybe they're important, idk): I ran out of bridge, got caught in a hell edification, and tried to escape mining through it, but The Hunger's killed me before I could end mining.

Terraria 1.4.0.2

 

[Aurora3500]

This is intended behavior. The WoF will not despawn like other bosses until it reaches the end on the side of the Underworld it is advancing towards. It gives players a chance to return to fighting the WoF.