nothing can ruin a team dynamic than the visible exclusion of someone.  whether it is a critical meeting, strategic plans, or just a quick coffee.

you may be saying “it may not be intentional, they just didn’t think about it”.

sure, but that doesn’t matter.  the person left behind will see it as intentional, and will more thank likely start withdrawing from the team.

go out of your way to include everyone in your circle.