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Starting Players don't get removed

Team > Reports > Player reports will always show your five starting players even after you've fired them.

Also, their elo doesn't get updated.
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This is not a bug. Reports are snapshots of how your team was doing while the snapshot was taken (while the daily update) and it's not meant to update after that. It is so you can always go back in history and see how your team was doing at certain moment as the snapshots are taken every day and compared to the previous one. Thank you for the feedback :)
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Cool, my bad and thanks for the answer!