Hail of Bullets - Defender - Not applying lethal damage

[Anamnesis]

Lethal damage over time is the primary damage type of the power and fire damage over time is the secondary damage from the Incendiary Ammunition Toggle.  Combat logs show mobs successfully being hit by Hail of Bullets.    The logs are showing some mobs not having any lethal damage over time applied to them only fire damage over time.  This is usually happening to one of three mobs in a round but can happen to all mobs in a round.   I've attached two text files.  Bug Report Hail of Bullets.txt is the full save of my Combat logs channel with the html tags removed.  Bug report Hail of Bullets 2 activations.txt is the same file edited to show two instances in which lethal damage is not applied.  Combat #1 only one mob of three did not have any lethal damage applied.  Combat #2 none of the three mobs had any lethal damage applied.

Bug Report Hail of Bullets.txt Bug Report Hail of Bullets 2 activations.txt