Key/crates not giving pokemon

**I am currently running**
- Modpack Name: Pixelmon latest as of 4 march 2019
- Java version: /
- Operating System: /

**Issue Description**
Used both my shiny key and custom key from the donor kit and they both got me nothing.
you may check my box(es) and party they have mudkip and a bunch of swinubs and maybe somthing from wondertrade.
My ingame name is dino_king
The shiny crate i just opened and then i exited the screen by accident and it didn't get me anything also i couldn't open chat or the game menu so i had to restart.
After logging i still had nothing, then i tried the custom crate and it stoped exited me out of the screen with no pokemon, also looked at my pc and it whas empty.