Incorrect detection of modified/renamed files

Test code:

import pygit2
repo = pygit2.Repository(pygit2.discover_repository(<repo_path>))

status = repo.status()
for filepath, flags in status.items():
    print(filepath, flags)

Running Result:

child.py 128
example.py 128
mvv.txt 513
mvvv.txt 4
name2.py 128
parent.py 128
x/mvv.txt 128
x/mvvv.txt 513
x/parent2.py 128
xname.py 128
zname.py 512
zname1.py 128

However, git status given me the result as:

On branch master
Changes to be committed:
  (use "git restore --staged <file>..." to unstage)
        renamed:    mvvv.txt -> mvv.txt
        new file:   x/mvvv.txt

Changes not staged for commit:
  (use "git add/rm <file>..." to update what will be committed)
  (use "git restore <file>..." to discard changes in working directory)
        deleted:    mvv.txt
        deleted:    x/mvvv.txt
        deleted:    zname.py

Untracked files:
  (use "git add <file>..." to include in what will be committed)
        .idea/
        child.py
        example.py
        name2.py
        parent.py
        x/mvv.txt
        x/parent2.py
        xname.py
        zname1.py

Which contains the renamed records.

Why this happened?
(If you want the test repo, I can zip it and send to your team mail if anyone provide me one.)

Beginne mit dem gezeigten Python-Snippet und dem Einstiegspunkt repo.status(), reproduziere dann die aufgeführten Flags anhand der entsprechenden Ausgabe von git status. Bestimme, ob die fehlenden oder abweichenden Umbenennungsdatensätze erwartetes Verhalten oder ein Fehler sind, und dokumentiere das erwartete Ergebnis sowie einen reproduzierbaren Verifikationsweg.