Trying out some glaive builds with the new hunter gauntlets and noticed that when using the heavy glaive Winterbite I was not slowing/freezing when using the melee. This only occurred when the Triton Vice arms overflowed the glaive magazine. Whenever I had more than 3 rounds in the magazine, the slow/freeze from melee attack never worked. As soon as I hit 3 rounds, the slow/freeze from melees reactivated.
I think I also lost the melee damage buff when the magazine had more than 3 rounds.