path.split strange behavior

it seems that there is an issue with the split method in path/filepath

I have looked at the debugger and it seems like it does not split the path into sections

go version:1.19

debugger output:https://imgur.com/a/VqgQznh

        case fsnotify.Rename:
                    dir, filename := path.Split(event.Name)
                    fileIndex := indexOfFile(filename, s.LoggedFiles[dir])
                    if fileIndex == -1 {
                        errChannel <- errors.New("file path does not exist in map")
                        break
                    }
                    s.LoggedFiles[dir] = append(s.LoggedFiles[dir], s.LoggedFiles[dir][fileIndex])
                    fmt.Println(s.LoggedFiles[dir])
                }