This is probably more of a rant than a problem, however I will throw what I perceive as the issue out and you can decide.
Several times I have been fighting a boss, have them down to less than 1000 hp, have to go eat something and even go to hospital and come back to finish them off to find when I attack them again their hp os back to where it was when I originally started fighting them. At first I thought this was maybe a glitch or problem with my phone or mac or whatever, then a clan mate said no, people will troll bosses looking for just such an instant that they can steal the win of the boss. Evidently people have become VERY good at it! So, either I suggest make it a way that the person fighting that boss is locked in or something to prevent this type of blatant disregard and theft from happening.
Thanks for your time...