Frag grenade barter - 3 for 1 volatile compound bugged

I bought 36 frag grenades with this barter and none of them showed up in my inventory.

After trying to purchase directly to vault they showed up, but the default purchase to inventory they just disapear.

I'm very disappointed to lose all those materials for nothing. Hopefully you can verify I purchased them and return them?

Reposted in here because I realized this is probably the proper forum.