CMarkupStatic crashes when mouse moves

I use CMarkupStatic for displaying infotext for some records...
When I move through the records by keypress I update the CMarkupStatic by SetMarkupText("some XAML") for every record.

Problem: If I move the mouse across the CMarkupStatic window - while scolling though the records - the application crashes at the function:

CXTPMarkupObject* CXTPMarkupObject::GetValue(CXTPMarkupDependencyProperty* pProperty)

were the passed pProperty is invalid.

Callstack:

ToolkitPro1202vc80D.dll!CXTPMarkupObject::GetValue(CXTPMarkupDependencyProperty * pProperty=0x032c8250)  Zeile 701 + 0xe Bytes    C++
ToolkitPro1202vc80D.dll!CXTPMarkupStyle::GetBasedStyle()  Zeile 154 + 0xe Bytes    C++
ToolkitPro1202vc80D.dll!CXTPMarkupInputElement::AddStyleTriggers(CXTPMarkupStyle * pStyle=0x032f7228, CXTPMarkupDependencyProperty * pProperty=0x032c8588, CXTPMarkupObject * pNewValue=0x032c8530)  Zeile 480 + 0x8 Bytes    C++
ToolkitPro1202vc80D.dll!CXTPMarkupInputElement::FireTriggers(CXTPMarkupDependencyProperty * pProperty=0x032c8588, CXTPMarkupObject * pNewValue=0x032c8530)  Zeile 563 + 0x17 Bytes    C++
ToolkitPro1202vc80D.dll!CXTPMarkupFrameworkElement::OnPropertyChanged(CXTPMarkupDependencyProperty * pProperty=0x032c8588, CXTPMarkupObject * pOldValue=0x032c8ef0, CXTPMarkupObject * pNewValue=0x032c8530)  Zeile 411    C++
ToolkitPro1202vc80D.dll!CXTPMarkupTextBlock::OnPropertyChanged(CXTPMarkupDependencyProperty * pProperty=0x032c8588, CXTPMarkupObject * pOldValue=0x032c8ef0, CXTPMarkupObject * pNewValue=0x032c8530)  Zeile 298    C++
ToolkitPro1202vc80D.dll!CXTPMarkupObject::SetValue(CXTPMarkupDependencyProperty * pProperty=0x032c8588, CXTPMarkupObject * pValue=0x00000000)  Zeile 628 + 0x1b Bytes    C++
ToolkitPro1202vc80D.dll!CXTPMarkupInputElement::OnMouseLeave(CXTPMarkupMouseEventArgs * __formal=0x0012cf08)  Zeile 266    C++
ToolkitPro1202vc80D.dll!CXTPMarkupContext::HandleMouseEnter(CXTPMarkupInputElement * pMouseOver=0x032f9298, CPoint point={...})  Zeile 465 + 0x1c Bytes    C++
ToolkitPro1202vc80D.dll!CXTPMarkupContext::HandleMouseMove(CXTPMarkupUIElement * pUIElement=0x032d26d0, CPoint point={...})  Zeile 500    C++
ToolkitPro1202vc80D.dll!CXTPMarkupContext::OnWndMsg(CXTPMarkupUIElement * pUIElement=0x032d26d0, unsigned int message=512, unsigned int wParam=0, long lParam=11796582, long * pResult=0x0012d384)  Zeile 672    C++
Toolsd.dll!CMarkupStatic::OnWndMsg(unsigned int message=512, unsigned int wParam=0, long lParam=11796582, long * pResult=0x0012d384)  Zeile 79 + 0x28 Bytes    C++


If I exclude CMarkupStatic::OnWndMsg() no crashes (but also no handling of hyperlinks,...)

I also tried the MarkUpSample. I added a OnTimer function to update the text of the CMarkupStatic periodically every 200ms. Everthing is fine except when I move the mouse across the control. After some moves the hyperlink does not show the mouseover and when exiting the program it asserts.

tx for help,
Bernt