So I'm sure many people have experienced this issue some time or another, as I myself has had it occur surplus of a dozen instances. You clear out the enemy team from one of the heavy ammo crates, you're sitting there with your rocket out, giddy in anticipation of all the kills you're gonna get, and then it appears, and you can't pick up any ammo. That's strange. Maybe I'll just try again. Still nothing. Then you and some random Titan just look at each other and he melees the crate. Then all of a sudden, the enemy team jumps into the room loaded down with rockets and heavy machine guns, and obliterate your team. This has really grown annoying lately, as it happened to me today, and yesterday in trials. It gives the other team a huge advantage, and I see no reason for it to be an issue. Heavy ammo is such a pivotal point in crucible matches, especially 3v3 games, that I believe this should be of the upmost importance, and should be addressed. If anyone else has this issue, let me know, but I've got a gut feeling this isn't just me.