Is it normal for students from last year not talking to you this year?

Some kids I know they change when they get older and want to be part of a click. Or prefer other teachers or have new favorites which happened. One student was one of my favorite students now doesn’t talk to me much. Even if I say hi and interact, it’s one answer words or his smile goes away when he sees me. Me smiles and hugs his new “favorite” teacher. I feel betrayed lol.
Some kids when I had since they were little, they prefer other teachers than me which is fine and say hi to them but they won’t do it with me.
Is it my voice? Is it because I’m a hard ass, my face expressions or my size that intimidates them? I’m tall (6’2) , plus size 22/24. I’m black. I know I’m not that pretty.
One little girls said a dry “Hi” when I said good morning. She used to ask for hugs but not anymore. She only hugs my two coworkers (4’10 and 5’7, white ladies. It seems like the kids like the good looking or fun teachers. Kids don’t listen to be when I. Stand firm. I was told I’m too nice and I should have lates down the law from day one.

Updates
5 mo
I’m an assistant teacher
Updates
5 mo
And I’m autistic
Is it normal for students from last year not talking to you this year?
Post Opinion