diff --git a/src/types/UiaTextRangeBase.cpp b/src/types/UiaTextRangeBase.cpp
index 6571d2ea13f..1658e6d2b16 100644
--- a/src/types/UiaTextRangeBase.cpp
+++ b/src/types/UiaTextRangeBase.cpp
@@ -42,9 +42,15 @@ HRESULT UiaTextRangeBase::RuntimeClassInitialize(_In_ IUiaData* pData,
                                                  _In_ std::wstring_view wordDelimiters) noexcept
 try
 {
+    RETURN_HR_IF_NULL(E_INVALIDARG, pData);
     RETURN_IF_FAILED(RuntimeClassInitialize(pData, pProvider, wordDelimiters));
 
+    // GH#8730: The cursor position may be in a delayed state, resulting in it being out of bounds.
+    // If that's the case, clamp it to be within bounds.
+    // TODO GH#12440: We should be able to just check some fields off of the Cursor object,
+    // but Windows Terminal isn't updating those flags properly.
     _start = cursor.GetPosition();
+    pData->GetTextBuffer().GetSize().Clamp(_start);
     _end = _start;
 
     UiaTracing::TextRange::Constructor(*this);