WHY cant we take gold box when the round ends and why did gold disappears ?
1) This feature of the work of anti-cheat system. If you try to take in some places the drop/Gold in flight, the system recognizes you as a cheater (players use third-party software). And in the end, no matter how much then do not lay the drop on the ground, you still will not be able to take it.
Read this article - http://help.tankionline.com/topics/2252-ne-beretsya-drop-gold-flag-ne-mogu-nanesti-uron/2) Because the round ends and goes to reset the system.
Customer support service by UserEcho