Problems with line numbering by CRichEditCtrl class

Question

Hi,
I'm using CRichEditCtrl control class and got some problems using line numbering option:
m_Edit.Create(ES_AUTOVSCROLL | ES_MULTILINE | ES_WANTRETURN | WS_CHILD | WS_VISIBLE | WS_VSCROLL, Rect, this, ID_EDIT);
m_Edit.GetParaFormat(pf);
pf.dwMask = PFM_NUMBERINGTAB | PFM_NUMBERINGSTART | PFM_NUMBERINGSTYLE | PFM_NUMBERING;
pf.wNumbering = PFN_ARABIC;
pf.wNumberingStyle = PFNS_PLAIN;
pf.wNumberingTab = 1000;
pf.wNumberingStart = 1;
m_Edit.SetParaFormat(pf);

1. After receiving the text from a file by InStream function all string numbers are equal 1.
2. In Windows 7 line numbers are growing from 1 to 255 and 255 is repeating up to the end of text. In Windows 10 the numbering is correct.