Ai doesn't end turn, probably because it got knocked down by a readied cantrip

i was able to reproduce the same issue twice. I have my party hiding to the left, all readying cantrips. Then an enemy walks onto the platform and several cantrips go over, one of them is the eldritch blast from my warlock, that knocks the enemy down. The Ai then does not end it's turn and I have to load a savefile. I tried it again and the same problem occurred. Both times the opponent took multiple cantrips hits from stealth and was knocked down. I will try not readying eldritch blast to continue, but please fix this.