I've noticed in some groups, especially the ones where most are a bit more extraverted, whenever I feel like finally saying something, I get cut off in the middle of it and pushed aside.
For example, some time ago I was out for dinner and I was not really talkative at that moment. I decided to try and say something, so I did. When I started my sentence I could tell they were actively directing their attention to me. Halfway my story, they decide to just cut me off and talk about something else.
To be clear, I wasn't interrupting them, it was silent for a couple second so I took my chance.
Why do some people do this?