I am seeing this being reported in our App, it seems to happen sometimes when a page with password box is loaded.
02d8e100 691c9e69 00912420 0328cd58 00000000 Windows_UI_Xaml!CCompositeFontFamily::CreateNew+0x175
02d8e124 6914d289 03260090 02d8e148 00000000 Windows_UI_Xaml!CFontFamilyMaker::Create+0x20
02d8e14c 691c9e22 00000048 02d8e164 02d8e174 Windows_UI_Xaml!CSimpleHash::Lookup+0xca
02d8e178 691eb536 03260090 00000000 02d8e1a4 Windows_UI_Xaml!CTypefaceCollection::LookupCompositeFontFamily+0x4a
02d8e204 691eafdb aaaaaaaa aaaaaaaa 00000000 Windows_UI_Xaml!CCompositeFontParser::ParseFamilyMapElement+0x4cf
02d8e244 691ebf3c aaaaaaaa 03225980 aaaaaaaa Windows_UI_Xaml!CCompositeFontParser::ParseFontFamilyElement+0x316
02d8e26c 691ebde2 aaaaaaaa aaaaaaaa 691ee918 Windows_UI_Xaml!CCompositeFontParser::LoadXml+0xf7
02d8e28c 691ebd53 00912420 0328cd58 aaaaaaaa Windows_UI_Xaml!CCompositeFontFamily::CreateFromXml+0x65
02d8e2ac 6914d289 0325faf0 02d8e2d0 00000000 Windows_UI_Xaml!CDefaultFontFamilyMaker::Create+0x44
02d8e2d4 691d4121 0000003c 02d8e2f0 02d8e2fc Windows_UI_Xaml!CSimpleHash::Lookup+0xca
02d8e300 691ebcf1 02d8e328 00912424 00000000 Windows_UI_Xaml!CTypefaceCollection::LookupDefaultFontFamily+0x5b
02d8e318 691ebc5f 00912420 00000000 00912424 Windows_UI_Xaml!CTypefaceCollection::CreatePALWrapper+0x7e
02d8e33c 693469f5 02d8e34c 0328d4e0 00000000 Windows_UI_Xaml!PALFontAndScriptServices::GetSystemFontCollection+0x57
02d8e358 69346e2c 00000000 aaaaaaaa 0328bd84 Windows_UI_Xaml!CTextBoxView::GetSystemFontCollection+0x38
02d8e380 69346db9 0328d4e0 00000190 aaaaaaaa Windows_UI_Xaml!CTextBoxView::GetRunFontFaceId+0x66
02d8e3a4 6480c6d7 aaaaaaaa 00000190 aaaaaaaa Windows_UI_Xaml!TextServicesHost::GetRunFontFaceId+0x33
02d8e570 6480c580 aaaaaaaa aaaaaaaa 008f2ed0 msftedit!CW32System::InitSysParamsDWrite+0x108
02d8e590 647891b2 008f2ed0 aaaaaaaa 02d8e6b0 msftedit!CTxtEdit::DelayedGlobalInitialization+0x26f
02d8e668 647890cd 008f2ed0 aaaaaaaa 02d8e690 msftedit!CTxtEdit::Init+0xc6
02d8e678 6478907b 00000000 0328bd80 64780000 msftedit!CreateTextServices+0x78
02d8e690 6934b143 00000000 0328bd80 008f2ed0 msftedit!CreateTextServices+0x26
02d8e6b8 6934affd 030b67b8 00000000 00000000 Windows_UI_Xaml!CTextBoxBase::InitializeTextServices+0xdb
02d8e6e4 697ea9af 00000000 030b67b8 697eadbf Windows_UI_Xaml!CTextBoxBase::Initialize+0x5a
02d8e6f0 697eadbf 00000000 008b0f58 02d8e798 Windows_UI_Xaml!CPasswordBox::Initialize+0x46
02d8e700 6917be11 02d8e730 02d8e780 aaaaaaaa Windows_UI_Xaml!CPasswordBox::Create+0x68
02d8e798 69181948 aaaaaaaa 02d8e7e4 00000000 Windows_UI_Xaml!XamlNativeRuntime::CreateInstance+0x266
02d8e804 6917d4fd 03232478 00000000 03178e20 Windows_UI_Xaml!ObjectWriter::Logic_CreateWithCtor+0x134
02d8e924 691ad4d1 aaaaaaaa 008b0f58 00000000 Windows_UI_Xaml!XamlWriter::WriteNode+0x90b
02d8e9ac 692b2c46 008b0f58 aaaaaaaa aaaaaaaa Windows_UI_Xaml!CParser::LoadXamlCore+0x41a
02d8ea10 692b3075 aaaaaaaa aaaaaaaa aaaaaaaa Windows_UI_Xaml!CCoreServices::ParseXamlWithExistingFrameworkRoot+0x76
02d8ea7c 692b2ecf 008b0f58 03237b60 031f5768 Windows_UI_Xaml!CApplication::LoadComponent+0x17a
02d8ea98 692b245a 008b0f58 03237b60 aaaaaaaa Windows_UI_Xaml!Application_LoadComponent+0x5a
02d8eac8 692b4807 008b0060 aaaaaaaa aaaaaaaa Windows_UI_Xaml!DirectUI::Application::LoadComponent+0xde
02d8eaf0 692b4678 00754848 03179558 00000000 Windows_UI_Xaml!DirectUI::ApplicationFactory::LoadComponentWithResourceLocationImpl+0x70
02d8eb08 012ee172 00b4bf14 00754848 03179558 Windows_UI_Xaml!DirectUI::ApplicationFactory::LoadComponentWithResourceLocation+0x6f
Has anyone seen this or know what might have caused it?