soraka bot bug. twisted treeline

so i was playing a bot game o n twisted treeline and i had made soraka play on both my team and the the opposing team. both where bots. and when ever they ended up below half health they just froze. didnt aa attack use spells or anything. i was also running ezreal and miss fortune on the other team to but they never seem to have been affected by it. have tested this twice with soraka and happened both times was just posting incase riot would like to look in to it. its not a big problem but it was a bug that i saw.