I am not sure what I did to trigger this, but here is what I did:
1. Finish a battle
2. Went to "Blueprints" tab in the shop and opened three Silver League Blueprints
3. Went to the garage and clicked on "Turret Modules" tab
4. hit the "Back" button.
I think that is how I got this glitch, but I am not quite sure. When I restarted my Client, everything was just fine.
Customer support service by UserEcho