WebDav WorkDir Windows not working

Hi, Git Windows somehow does not work with a Webdav Workdir even wenn connected to a Drive-Letter. It seems like everything work except stat. So I can checkout to the Webdav Workdir and all the files are checked out, but git status says the files are deleted even still there. I can also commit the files, but next git status says deleted again. When I checkout the files again checkout says error files exist. This is somehow strange. Unfortunately I still can't add a not empty worktree, my workaround is add the worktree to another dir and then move the .git file and edit the dir name in the worktrees/xyz folder. But now I have the strange Webdav Problem...