The Team Info page states formations that have unavailable players. However, it is not accurate.

If a player has a red card in the Premier League, but is playing in Cup match soon in a different Formation, the Team Info page incorrectly states that the Cup formation has unavailable players.

The red card in the Premier League appears to be triggering the warning message for the Cup formation.

You are correct, the next match’s competition is taken into account when displaying the message for any of your formations, even the ones not selected for the next match. We can definitely enhance that, I’ll add to our list, I don’t think it’s there.