I wrote a long response and lost it, so this will probably be more concise as I'm annoyed at having to do it again, LOL!
As a retired teacher just doing a bit of relief work, my short answer would be that maybe you are being a bit over-sensitive, in my opinion, and I would not say anything unless a lot more things happen that continue to grate on your nerves. If it appears that the teacher generally wants the best for the children, then I would pick my battles and not mention this one. I can't imagine he/she was trying to make children love one parent more than the other. I would say something just got lost in translation.
As Diane mentioned, I would first of all make sure you have a friendly and positive relationship with your child's teacher, and then it is easier to bring up this type of thing if it's not just negatives that you address. Teachers of very young children have a huge job, often with very little encouragement and support from parents, and it is very easy to do or say something that is not quite politically correct.
As a parent, do you every say or do anything with your children that you later regret? It's the same with teachers, only they have 25-28 children, not 1-5. They are human, just like parents, and will say and do things that can be perceived to be 'wrong'.
Your children will treat their teacher with the same sort of respect, or lack of, as you show at home, so if you have an issue, try not to bad-mouth the teacher in front of them.
Most teachers would want to do the right thing by your child, but it's very difficult if the only feedback you ever get is negative. Imagine if the teachers had access to your home, and picked you up on everything you do or say, and only comment on the negative.
By the way, a child's most important teachers are his/her parents. They hold far more weight than any particular teacher and can override the inadequacies of a teacher or two throughout their child's school life.
I'm trying to be quick, because maybe I took too long on the last one and that is why I lost it!
I am sure you are doing an awsome job in bringing up your children, and that it is not an easy task. It is a bit the same as a teacher.
All the best!