I have a SS/RA Brute and I noticed the following behavior with the power "particle shielding"
The power has a duration of 1 minute
Current recharge on the build I made is 39 seconds
When first cast the applied absorb value is 993.55
If cast a second time before the powers duration fully expires the recast absorb value gets reduced to 505.71
Then on the 3rd cast the value is restored to it's original 993.55
Rinse and repeat...
Global recharge with hasten is 105.00% and Particle shielding is slotted with 3x level 53 reconstruction d-sync rech/heal/absorb enhcanments
Edit: The absorb values "DO NOT" stack on top of each other, once cast again even if the duration has not been met, it is replaced with the new value, Either higher or lower. Second edit: Providing exact absorption values. Third edit: Recharge and slotting info added
It appears that every "odd" number cast if applied prior to the powers duration expiration causes it to lose a significant portion of it's absorption, while every even cast it applies the correct value.
Looks like a bug to me but maybe this is just a "normal undeclared game mechanic" and I'm just stupid?