How to know when your inventory is empty:
- When you log onto Soldier front, it will directly take you to the shop, Just like when you were a trainee.
What to do?
You must re-log, join a server either it's the USA or EU server.
After joining ONE of them, you must leave the server you're currently in and go to another server, then go back to the server you were in before changing servers.
I joined the USA server, noticed that my Inventory was still empty even after re-logging, i leave the USA server and join the EU server then leave the EU server and join the USA server once again.