There is a bug with the Exotic Sniper Rifle, Ice Breaker. ​When shattering frozen enemies with Ice Breaker, Ignitions often fail to trigger. Specifically, the VFX and SFX of the energy condensing (the "wind-up" before an ignition) play correctly, but the actual explosion does not occur. ​I tried to reproduce the bug in the shooting range, but it functioned normally there. Since this issue only occurs during actual missions, it seems to be a server-side or latency-related problem.