Originally Posted by Zandel

That must be the reason I keep solo killing these bosses with 1 unit.... any idea when the bug will be fixed so we can share these bosses?

Even with the bug, hitting with a single 2* should leave the mid to high level bosses alive. Not sure exactly what it is, but it looks like the attacks time out after a while or there's a cap to the number of attacks that can be made. VS a level 50 boss's 350k hp, my 2* does about 16k damage.

You should be able to share with a few allies this way.