No container drop after 12 missiles assembled

I’ve assembled 12 missiles, take the losat and keep one report for the japanese plane but I want to sell my useless resources but I don’t drop any empty tradable container, what is this bug or how can I drop these ?

i mean its random chance just like most of the event, and you get them from the crates that drop the resources

So why after 240/360 crates dropped I didn’t drop one ? It can be random but it’s impossible after 240 crates, it’s a bug or a troll from gaijin, some people can sell all of their resources and not me, it’s not fair

i mean it could be a bug, you could also just have horrible luck, also how did you assemble 12 missiles

Did you not get any? There is a cap of 20 per person for the drops.

no any