Title says it all.
Examples:
Black powder + heart seeker = stealth. Can do it three times for 3 stealth procs. This should give 6 stacks of might but it only gives four.
Shadow refuge. Pulses 5 times. Might stacks are delayed(takes about 5 seconds AFTER SR is gone to get 8 stacks), and only gives 8 stacks of might vs 10 stacks of might(if it truly pulses 5 times).
black powder + cluster bomb also does it….delayed and only 2 stack ticks of hidden assassin.
might be other examples.