Bane vs Kelleran bug

I went in with Bane and Dooku (with Dooku cron) against a simple Kelleran team with the Jedi Anakin cron and level 6 bonus with whenever they get hit they recover 12% health. But this was not the issue. When it was only Bane vs Kelleran, Kelleran would not die. THere was a green bar and  he took all the hits and drains (I tried basic attack, auto, everything)