Interesting! Good to know, it only happened with Minthy for me.
Venturing on to Act 3, I noticed that when you meet the Strange Ox in the barn, Minthara thinks that she saw it run away while you slaughtered people at the Grove, even if the Grove wasn't attacked. This probably needs a new line for the "good" and neutral route.
Having her eat the Astral tadpole (so it's gone) does not remove the persuasion lines from the dialogues of the other companions, though I assume this is a general tadpole problem.
