Players loses CommandStats{} after Death

Steps to reproduce?

1. Add a dummy objective

/scoreboard objectives add Test dummy

2. Set score for player to 0 (another bug with this)

/scoreboard players set @p Test 0

3. Set objective display sidebar

/scoreboard objectives setdisplay sidebar Test

4. Add CommandStats to you

/stats entity @p set SuccessCount @p Test

5. Perform a random command

/say Hi

Should change to 1 (if it hadn't already because of step 4)

6. Set score back to 0

/scoreboard players set @p Test 0

7. Die

8. Perform a random command again

/say Hi