Should I ask him about it?k

Before I met my boyfriend and lived with my parents, I had 0 privacy. My mom would snoop through my phone if she could see it so I kept a lock on my phone and I kept the messages to show up as “message” instead of what the message says.

When I moved in with my boyfriend, I took off my passcode but didn’t think so change the message thing because it was never a big deal. My boyfriend hasn’t had a passcode on his phone and his messages didn’t pop up as “message” it gave a preview of what the message said.

But just recently, like a couple days ago, he changed it so that it doesn’t give you a preview, it just says message. Am I overreacting or is that a little suspicious? I feel weird about it because in over the time we have been together (a year and some change) he hasn’t used that feature, it makes me feel like he is hiding something. If me having was a problem, he should have told me because I would have changed it, I just never thought to. Also, I don’t have a lock on my phone so he shouldn’t even feel weird about it because he has free access to my phone always. But now that he did it so out of the blue I feel like he doesn’t want me to see someone’s messages or something. I have trust issues that I am working through so I just needed someone else’s opinion to tell me if I am overreacting or not. Should I ask him about it or let it go? Thanks!