Struggling to understand social cues of a peer group after moving

Hello everyone,

About six months ago, I joined a running club in my city. We met up every week, ran a 5K, and would chat afterwards. There were about 5-10 of us and we even followed each other on social media. It was a nice, free club that basically revolved around a group chat.

I’ve since moved to another city, and a week after my move, I was kicked out of the group chat. This was a bit of a shock because the chat was essentially the lifeblood of the club. What’s more, the people from the club still follow me on social media and view all my stories, but none of them have reached out to ask how I’m doing. When I comment on their posts to strike up a conversation, I often get responses along the lines of “Yeah cool, have a nice summer,” which leaves me feeling a bit dismissed.
I’m having trouble understanding this type of behavior.

I was brought up in a very sheltered and somewhat neglected environment, and as a result, I sometimes struggle with interpreting social cues. I’m trying to navigate a particular social situation and would really appreciate your insights.

Is it that friendships have become more casual or flaky in recent years, or could it be something I’ve done? How should I interpret it? Have they just moved on i.e. the connection was very shallow? Maybe I’m misinterpreting their actions? I’d love to hear your thoughts and advice on this situation.
Thank you in advance for your help!