Missing Reward from Coal Crate

[CoIine]

I recently managed to get to L3 and got a coal crate key as a reward. However, after pressing right click while holding the key on the coal crate chest, I received a message stating that the I have opened the crate and yet I did not receive any reward in my inventory. Below are the screenshots:

 

[MrFrenco]

Hello,

you got 10 XP levels from the coal crate key (Before: 13 XP levels, after: 23 XP levels).

Requesting to lock...

 

[Mr_Alansaari]

Coal crates sometimes give EXP levels / Money / MCMMO levels/credits
If you get one of those, it usually does NOT show a message in chat.

you have to watch those to make sure!

 

[Haoiscoll]

Since it has been requested to be locked,
@Davidva @Chairman please do the honours. Thanks.

 

[ChairmanSB]

Locking