In December 2020, about a glitch with the Cold Front gun and its Dragonfly perk in Destiny 2. Despite the Cold Front submachine gun being a Kinetic weapon, it can still roll with the Dragonfly perk. In other words, Cold Front can drop for players equipped with the Dragonfly perk, which causes an elemental explosion on kill, despite the fact that Kinetic weapons don’t have an associated element. This leaves what the perk is actually doing on kill as kind of a question mark.
As you might imagine, this has caused some issues that have ultimately caused Bungie to remove this roll in an upcoming patch. Bungie’s assistant director for Destiny 2, Joe Blackburn took to to announce this and explain the decision: “Wanted to give a quick update on Coldfront. The Dragonfly perk was not designed to work with kinetic weapons and causes some technical errors. Because of this, in an upcoming patch all Coldfronts with the Dragonfly perk will have it replaced with the Swashbuckler perk.”