Autistic Son is Scared of his AAC

my (8)son is nonverbal/minimal speaking but he’s been using an aac device since he was 3. The school district gave it to him when he was 5 and he’s been using that one up until 2 weeks ago. I purchased a new one for him since we are moving out of state. He’s been using that one up until earlier this week. He makes me type on it and runs and scream at me to “put it away.” Is this because this is a new one or a new environment or something else?