If you do hunts it would be great if you could enable the damage verification and send me the log + which mob was hunted. This feature needs some more testing and it can't be done with replay tests a i don't get exact times there. So any log will help
And one question - it can be that i misinterpreted the regeneration speed and regeneration time values in the entropedia data.
Could cause the problem...
Another issue could result from regeneration time tracking. Right now there is no cross check if the time can be for real as it depends on the gun and mob hp aswell as the regeneration rate which depends on the time....
This is the most likely reason for that behavior imo