Put the summary of the bug you're having here

When i died by a creeper explosion , mobs become invisible for me , i had to leaved and join my game again for seeing mobs . i havent more evidence or explication

What I expected to happen was...:
nothing special 

What actually happened was...Steps to Reproduce:

1. i was look inside a chest , a creeper has exploded and he killed me
2. i come back at my death position and everymobs are invisible
3. i had to restart my game to see mobs again