Don't use cached inherited props for distributed nodes.

Source/core/css/resolver/StyleResolver.cpp

Index: Source/core/css/resolver/StyleResolver.cpp
diff --git a/Source/core/css/resolver/StyleResolver.cpp b/Source/core/css/resolver/StyleResolver.cpp
index 9ef098decd20a0d3ba192f02d25b35f67ba5364f..a66ed4a26c9bd26f8fa9b4b52069494075e42e39 100644
--- a/Source/core/css/resolver/StyleResolver.cpp
+++ b/Source/core/css/resolver/StyleResolver.cpp
@@ -1357,7 +1357,8 @@ void StyleResolver::applyMatchedProperties(StyleResolverState& state, const Matc
         // style declarations. We then only need to apply the inherited properties, if any, as their values can depend on the
         // element context. This is fast and saves memory by reusing the style data structures.
         state.style()->copyNonInheritedFrom(cachedMatchedProperties->renderStyle.get());
-        if (state.parentStyle()->inheritedDataShared(cachedMatchedProperties->parentRenderStyle.get()) && !isAtShadowBoundary(element)) {
+        if (state.parentStyle()->inheritedDataShared(cachedMatchedProperties->parentRenderStyle.get()) && !isAtShadowBoundary(element)
+            && (!state.distributedToInsertionPoint() || state.style()->userModify() == READ_ONLY)) {
             INCREMENT_STYLE_STATS_COUNTER(*this, matchedPropertyCacheInheritedHit);
 
             EInsideLink linkStatus = state.style()->insideLink();