time of need seems to stop working in map

Hi all

just started using time of need to see how it would work with debuffing ailments with abyss maps.....heres what happens

when in HO it works just fine. When i initially enter map it works just fine. Once i start taking damage it no longer works on my character. How do i know this...after combat ill cast a few shield walls which are linked to life and i will not regain life because the time of need wont proc. However after about a minute it will turn back on again. I am weapon swapping which may seem to be an issue or not? Until this is fixed Time of Need is a dead skill