Unstage file and disposing Repository

Hello Im new in gitlib2sharp world and maybe I dont know all issues but here is my problem or maybe a bug.

using (var repo = new Repository(path))
{
     FileStatus statusOfFileBeforeUnstageInFirstScope = repo.RetrieveStatus(relativePath);
     Commands.Unstage(repo, relativePath);
     FileStatus statusOfFileAfterUnstageInFirstScope = repo.RetrieveStatus(relativePath);
}

using (var repo = new Repository(path))
{
     FileStatus statusOfFileAfterUnsgaeSecondScope= repo.RetrieveStatus(relativePath);
}

Can someone tell me why variables statusOfFileBeforeUnstageInFirstScope and statusOfFileAfterUnsgaeSecondScope has same values: 'ModifiedInIndex'. After Unstage operation I have good state but after disposing Repository state is changed.

從 issue 中所示的 Repository(path) 生命週期以及 Commands.Unstage 和 RetrieveStatus 呼叫開始。使用 scope 比較每個呼叫內回報的狀態，並比較 Repository 釋放後的狀態；完成的標準是：釋放相關的狀態行為已獲得解釋或修正，且前後結果一致。