Summoned fireworks don't explode

Summoned fireworks don't explode

What I expected to happen was...:
That the firework would explode when summoned.

What actually happened was...:
The firework launched up, but didn't explode in colors (at all).

Steps to reproduce:
1. Put down a command block with this command:

/summon FireworksRocketEntity ~0 ~1 ~0 {LifeTime:10,FireworksItem:{id:401,Count:1,tag:{Fireworks:{Explosions:[{Type:0,Flicker:1,Trail:1,Colors:[8912683],FadeColors:[15925056]}]}}}}

2. Activate the command block with a button
3. Notice how it doesn't explode

Note:

• If you craft a firework manually, it works.
• This is not a problem in 1.8.8