diff --git a/Libraries/LibWeb/Layout/LayoutRustBridge.cpp b/Libraries/LibWeb/Layout/LayoutRustBridge.cpp
index 236eddbec68d7..c3137b9faafab 100644
--- a/Libraries/LibWeb/Layout/LayoutRustBridge.cpp
+++ b/Libraries/LibWeb/Layout/LayoutRustBridge.cpp
@@ -1118,12 +1118,6 @@ RustFFI::FfiLayoutFcCallbacks LayoutRustBridge::formatting_context_callbacks()
         .arena = m_commit_root->arena_handle(),
         .initial_containing_block_inline_size = m_commit_root->document().viewport_rect().width().raw_value(),
         .document_in_quirks_mode = m_commit_root->document().in_quirks_mode(),
-        .needs_inset_resolution = [](void*, void* node) {
-            auto const& styled_node = *static_cast<NodeWithStyle const*>(node);
-            if (styled_node.computed_values().position() == CSS::Positioning::Relative)
-                return true;
-            auto const* box = as_if<Box>(styled_node);
-            return box && box_inset_properties_contain_anchor_functions(*box); },
         .report_unexpected_fragmented_inline = [](void*, void* node) {
             auto const& box = *static_cast<Box const*>(node);
             dbgln("FIXME: InlineFormattingContext::dimension_box_on_line got unexpected box in inline context:");
diff --git a/Libraries/LibWeb/Rust/src/layout/abspos_engine.rs b/Libraries/LibWeb/Rust/src/layout/abspos_engine.rs
index f59d942bc78ba..c36556903e5ad 100644
--- a/Libraries/LibWeb/Rust/src/layout/abspos_engine.rs
+++ b/Libraries/LibWeb/Rust/src/layout/abspos_engine.rs
@@ -1805,25 +1805,24 @@ impl AbsposEngine {
         treat_block_axis_percentage_insets_as_auto_beyond_root: bool,
     ) {
         // Most boxes are neither relatively positioned nor carry anchor()
-        // insets. Preserve the old C++ fast path without populating the
-        // comprehensive Rust facts caches for those boxes.
-        // SAFETY: The callback only reads the live node's computed values.
-        if !unsafe {
-            (self.callbacks.needs_inset_resolution)(self.callbacks.context, self.callbacks.shell(node))
-        } {
-            return;
-        }
+        // insets, and both facts come straight from the node's style payload.
         let initial_style = self.style(node);
-        let resolved = if initial_style.inset_top().contains_anchor_function()
+        let has_anchor_insets = initial_style.inset_top().contains_anchor_function()
             || initial_style.inset_right().contains_anchor_function()
             || initial_style.inset_bottom().contains_anchor_function()
-            || initial_style.inset_left().contains_anchor_function()
-        {
+            || initial_style.inset_left().contains_anchor_function();
+        if !has_anchor_insets && initial_style.position() != positioning::RELATIVE {
+            return;
+        }
+        // Anchor resolution also refreshes the box's default scroll shift, so
+        // an anchor-bearing box resolves its insets even when it turns out not
+        // to be relatively positioned.
+        let resolved = if has_anchor_insets {
             self.resolve_anchor_insets(node, None, NodeSlotId::INVALID)
         } else {
             None
         };
-        let style = self.style(node).with_resolved_insets(resolved.as_ref());
+        let style = initial_style.with_resolved_insets(resolved.as_ref());
         if style.position() != positioning::RELATIVE {
             return;
         }
diff --git a/Libraries/LibWeb/Rust/src/layout/formatting_context.rs b/Libraries/LibWeb/Rust/src/layout/formatting_context.rs
index fffb9021ebf47..144c53a0c7c84 100644
--- a/Libraries/LibWeb/Rust/src/layout/formatting_context.rs
+++ b/Libraries/LibWeb/Rust/src/layout/formatting_context.rs
@@ -936,7 +936,6 @@ pub struct FfiLayoutFcCallbacks {
     pub arena: *mut c_void,
     pub initial_containing_block_inline_size: CssPixels,
     pub document_in_quirks_mode: bool,
-    pub needs_inset_resolution: unsafe extern "C" fn(*mut c_void, *mut c_void) -> bool,
     pub report_unexpected_fragmented_inline: unsafe extern "C" fn(*mut c_void, *mut c_void),
     pub build_svg_facts: unsafe extern "C" fn(*mut c_void, *mut c_void) -> FfiSvgElementFacts,
     pub read_paintable_geometry: