Android Question Why File.CopyAsync fails in debug mode but runs fine in release mode?

Sub GetStringFromFile(strFile As String) As ResumableSub
    
    Dim lBytes As Long
    Dim strResult As String
    
    If File.Exists(File.DirInternal, strFile) = False Then
        Wait For (File.CopyAsync(File.DirAssets, strFile, File.DirInternal, strFile)) Complete (bSuccess As Boolean)
        Log("bSuccess: " & bSuccess)
    End If
    
    'RAF is RandomAccessFile
    RAF.Initialize(File.DirInternal, strFile, True) 'fails in debug mode with java.io.FileNotFoundException:
                                                    '/data/user/0/b4a.exampleljjll/files/db_folder.txt: open failed: 
                                                    'ENOENT (No such file or directory)
    
    lBytes = RAF.Size

    'this will be a zero-based UTF8 byte array
    '-----------------------------------------
    Dim arrBytes(lBytes) As Byte
    RAF.ReadBytes(arrBytes, 0, lBytes, 0)
    
    strResult = BytesToString(arrBytes, 0, lBytes, "UTF-8")
    
    Return strResult
    
End Sub