*** DO NOT LAND *** Attempt to understand Regions complexity

Source/core/rendering/LayoutState.cpp

Index: Source/core/rendering/LayoutState.cpp
diff --git a/Source/core/rendering/LayoutState.cpp b/Source/core/rendering/LayoutState.cpp
index 940f21ccc16147fb316aca0375b1a08ef5cdedeb..5141e5d8f383008f660ddf7d900d5c0df845b3d5 100644
--- a/Source/core/rendering/LayoutState.cpp
+++ b/Source/core/rendering/LayoutState.cpp
@@ -82,7 +82,7 @@ LayoutState::LayoutState(LayoutState* prev, RenderBox* renderer, const LayoutSiz
 
     // If we establish a new page height, then cache the offset to the top of the first page.
     // We can compare this later on to figure out what part of the page we're actually on,
-    if (pageLogicalHeight || m_columnInfo || renderer->isRenderFlowThread()) {
+    if (pageLogicalHeight || m_columnInfo) {
         m_pageLogicalHeight = pageLogicalHeight;
         bool isFlipped = renderer->style()->isFlippedBlocksWritingMode();
         m_pageOffset = LayoutSize(m_layoutOffset.width() + (!isFlipped ? renderer->borderLeft() + renderer->paddingLeft() : renderer->borderRight() + renderer->paddingRight()),
@@ -119,7 +119,7 @@ LayoutState::LayoutState(LayoutState* prev, RenderBox* renderer, const LayoutSiz
     m_layoutDeltaYSaturated = m_next->m_layoutDeltaYSaturated;
 #endif
 
-    m_isPaginated = m_pageLogicalHeight || m_columnInfo || renderer->isRenderFlowThread();
+    m_isPaginated = m_pageLogicalHeight || m_columnInfo;
 
     if (lineGrid() && renderer->hasColumns() && renderer->style()->hasInlineColumnAxis())
         computeLineGridPaginationOrigin(renderer);