RichEditD2D inserts everything with alpha

Question

When using Richedit20W and switching it to D2D with

    SendMessage(hRichEdit, EM_SWITCHTOD2D, 0, 0);

and using

    int backdrop = 3;
    DwmSetWindowAttribute(hwnd, DWMWA_SYSTEMBACKDROP_TYPE, &backdrop, sizeof(backdrop));

    MARGINS margins = { -1 };
    DwmExtendFrameIntoClientArea(hwnd, &margins);

Both text and images are inserted with transparency, unlike with Richedit20W and 50" where D2D mode isn't enabled;

Non Direct2D: