all currened spawned mobs turn invisable when player dies.

When the player Dies, all mobs that are current;y spawned in turn inadvisable and are rendered invulnerable to punches and swords making them killable only by minecraft:bow,

What I expected to happen was...:
the mobs to be normal?

What actually happened was...:
currently spawned mobs go invisible (Not even a Shadow) and are only killable by ranged weapon apon respawn

Steps to Reproduce Demonstrate:

this'll work with any mob
1. Dig/build an area near spawn or base to contain the mobs
2. let them kill you
3. go back to containment area

        -(they should be inadvisable at this point)

4.a if you hear the mobs still and don't believe they are, try to kill with sword first.

        4b. if sword is unsuccessful, spray containment area with Arrow fire

Link: https:/youtu.be/0jKRAthwn0Q