A team member and I recently worked on a small part of a pretty big (and high profile) issue. This person looked up relevant details on the prod website and I looked up relevant details on the database. We each only have portion of the access. I came up with most of the theories on what is happening and why. Database is not well developed yet so we don't have full visibility into what is happening.
After we were done, I said "Hey when you meet with the dev team, let me know. I'd love to join." and the response was "Yeah sure. I was going to fwd the invite to you anyway". There was a meeting the next day and I was not invited, nor was I CC'ed in any of the emails that were exchanged between the person and the team. I don't expect there to be any follow up meetings regarding this.
I have worked in this company for a month. This person has been with the company for many years. They changed the team less than a month back and I imagine that they can contribute to this a little less than I can because background isn't security. The dev team and this person have no previous established relationship. Other than this one task, I have not worked with this person before so I don't know this person's work style.
I don't want to come across as paranoid and insecure but I also don't want to be left out of important meetings this early in my time with the company. Should I be concerned that I am intentionally being left out? Or just assume ignorance until proven otherwise because this is the first time?
Edit: I have been invited to meetings where future project requirements are being discussed. I take the role of sitting in a corner, being confused and making notes of questions to look up or ask later. This would be the first time I might've made a contribution because I worked on the issue being discussed.