--- a/gfx/layers/wr/WebRenderLayerManager.cpp
+++ b/gfx/layers/wr/WebRenderLayerManager.cpp
@@ -549,41 +549,49 @@ WebRenderLayerManager::GenerateFallbackD
 
   LayerIntSize imageSize = RoundedToInt(bounds.Size());
   aImageRect = LayerRect(LayerPoint(0, 0), LayerSize(imageSize));
   if (imageSize.width == 0 || imageSize.height == 0) {
     return nullptr;
   }
 
   aOffset = RoundedToInt(bounds.TopLeft());
-  nsRegion invalidRegion;
+
+  bool needPaint = true;
   nsAutoPtr<nsDisplayItemGeometry> geometry = fallbackData->GetGeometry();
 
-  if (geometry) {
+
+  // nsDisplayFilter is rendered via BasicLayerManager which means the invalidate
+  // region is unknown until we traverse the displaylist contained by it.
+  if (geometry && !fallbackData->IsInvalid() &&
+      aItem->GetType() != DisplayItemType::TYPE_FILTER) {
     nsRect invalid;
+    nsRegion invalidRegion;
+
     if (aItem->IsInvalid(invalid)) {
       invalidRegion.OrWith(clippedBounds);
     } else {
       nsPoint shift = itemBounds.TopLeft() - geometry->mBounds.TopLeft();
       geometry->MoveBy(shift);
       aItem->ComputeInvalidationRegion(aDisplayListBuilder, geometry, &invalidRegion);
 
       nsRect lastBounds = fallbackData->GetBounds();
       lastBounds.MoveBy(shift);
 
       if (!lastBounds.IsEqualInterior(clippedBounds)) {
         invalidRegion.OrWith(lastBounds);
         invalidRegion.OrWith(clippedBounds);
       }
     }
+    needPaint = !invalidRegion.IsEmpty();
   }
 
-  gfx::SurfaceFormat format = aItem->GetType() == DisplayItemType::TYPE_MASK ?
-                                                    gfx::SurfaceFormat::A8 : gfx::SurfaceFormat::B8G8R8A8;
-  if (!geometry || !invalidRegion.IsEmpty() || fallbackData->IsInvalid()) {
+  if (needPaint) {
+    gfx::SurfaceFormat format = aItem->GetType() == DisplayItemType::TYPE_MASK ?
+                                                      gfx::SurfaceFormat::A8 : gfx::SurfaceFormat::B8G8R8A8;
     if (gfxPrefs::WebRenderBlobImages()) {
       bool snapped;
       bool isOpaque = aItem->GetOpaqueRegion(aDisplayListBuilder, &snapped).Contains(clippedBounds);
 
       RefPtr<gfx::DrawEventRecorderMemory> recorder = MakeAndAddRef<gfx::DrawEventRecorderMemory>();
       // TODO: should use 'format' to replace gfx::SurfaceFormat::B8G8R8A8. Currently blob image doesn't support A8 format.
       RefPtr<gfx::DrawTarget> dummyDt =
         gfx::Factory::CreateDrawTarget(gfx::BackendType::SKIA, gfx::IntSize(1, 1), gfx::SurfaceFormat::B8G8R8A8);