Elder guardian doesn't check if a player is alive to apply mining fatigue effect

Elder guardian doesn't check if a player is alive to apply mining fatigue, causing effect applying animation to display indefinetly

Refer to the screenshot for a visual guide on how to arrange the command blocks.

How to reproduce:

1. Place a normal command block facing the always active chain command block.
2. Input the following command into the chain command block:

   /summon elder_guardian

1. Input the following command into the normal command block:

   /kill @p

1. Switch your game mode to survival, and activate the normal command block using a button.

Observed results: 

The elder guardian ghost will spawn indefinitely even after the player dies.

Expected results:

The elder guardian ghost will not appear upon death.