I have yet to discuss this with someone in the team / on the team
Which one of these is correct?
The text was autocorrected by software from "in the team" to "on the team".
In a sentence about membership (someone's relationship to a team) "on" is the preposition to use. The word "on" is used to indicate physical location but also membership in an organization.
He is on the board of directors (he is a member).
He is on the school's baseball and track teams.
However, there are also expressions that use "in" to describe a role, a position, or membership in an organization or hierarchy:
He is in the fraternity.
She is in the legislative branch of government.
His position is in the C-suite of a global corporation.