After a confrontation at dragon between two teams, a chase broke out and everyone left dragon. The only sight of dragon was with a green and pink sight ward from one team. After returning to dragon, it's health remained the same from when we left.

It only had 25% hp and did not regenerate.

List of Champs ingame.

Diana, Xin, Misfortune, Singed, Sona

Olaf, Ezreal, Lux, Alistar, Rengar

Hmmmm. I better report this in the bug section. Whoops.

sounds more realistic don't you think :P