When nzoth stacks detonate they only detonate how many stacks you had at the time. If you gain 2 stacks mid-detonate those stacks need to proc detonate AGAIN to be consumed.

[seanpeters86]

Saeldur fixed this here https://github.com/simulationcraft/simc/commit/dfc8dffe4e84466db810026d841d62a7e0516ebd

need to test