--- a/gfx/layers/wr/WebRenderBridgeParent.cpp
+++ b/gfx/layers/wr/WebRenderBridgeParent.cpp
@@ -613,19 +613,20 @@ WebRenderBridgeParent::RecvSetDisplayLis
   // This ensures that destroy operations are always processed. It is not safe
   // to early-return from RecvDPEnd without doing so.
   AutoWebRenderBridgeParentAsyncMessageSender autoAsyncMessageSender(this, &aToDestroy);
 
   wr::Epoch wrEpoch = GetNextWrEpoch();
 
   mAsyncImageManager->SetCompositionTime(TimeStamp::Now());
 
-  ProcessWebRenderParentCommands(aCommands);
+  wr::TransactionBuilder txn;
+  ProcessWebRenderParentCommands(aCommands, txn);
+  mApi->SendTransaction(txn);
 
-  wr::TransactionBuilder txn;
   if (!UpdateResources(aResourceUpdates, aSmallShmems, aLargeShmems, txn)) {
     return IPC_FAIL(this, "Failed to deserialize resource updates");
   }
 
   mReceivedDisplayList = true;
 
   // aScrollData is moved into this function but that is not reflected by the
   // function signature due to the way the IPDL generator works. We remove the
@@ -703,17 +704,19 @@ WebRenderBridgeParent::RecvEmptyTransact
   UpdateFwdTransactionId(aFwdTransactionId);
 
   // This ensures that destroy operations are always processed. It is not safe
   // to early-return without doing so.
   AutoWebRenderBridgeParentAsyncMessageSender autoAsyncMessageSender(this, &aToDestroy);
 
   if (!aCommands.IsEmpty()) {
     mAsyncImageManager->SetCompositionTime(TimeStamp::Now());
-    ProcessWebRenderParentCommands(aCommands);
+    wr::TransactionBuilder txn;
+    ProcessWebRenderParentCommands(aCommands, txn);
+    mApi->SendTransaction(txn);
     ScheduleGenerateFrame();
   }
 
   UpdateAPZFocusState(aFocusTarget);
 
   if (!aCommands.IsEmpty()) {
     wr::TransactionBuilder txn;
     wr::Epoch wrEpoch = GetNextWrEpoch();
@@ -746,37 +749,39 @@ WebRenderBridgeParent::RecvSetFocusTarge
 }
 
 mozilla::ipc::IPCResult
 WebRenderBridgeParent::RecvParentCommands(nsTArray<WebRenderParentCommand>&& aCommands)
 {
   if (mDestroyed) {
     return IPC_OK();
   }
-  ProcessWebRenderParentCommands(aCommands);
+  wr::TransactionBuilder txn;
+  ProcessWebRenderParentCommands(aCommands, txn);
+  mApi->SendTransaction(txn);
   return IPC_OK();
 }
 
 void
-WebRenderBridgeParent::ProcessWebRenderParentCommands(const InfallibleTArray<WebRenderParentCommand>& aCommands)
+WebRenderBridgeParent::ProcessWebRenderParentCommands(const InfallibleTArray<WebRenderParentCommand>& aCommands,
+                                                      wr::TransactionBuilder& aTxn)
 {
-  wr::TransactionBuilder txn;
   for (InfallibleTArray<WebRenderParentCommand>::index_type i = 0; i < aCommands.Length(); ++i) {
     const WebRenderParentCommand& cmd = aCommands[i];
     switch (cmd.type()) {
       case WebRenderParentCommand::TOpAddPipelineIdForCompositable: {
         const OpAddPipelineIdForCompositable& op = cmd.get_OpAddPipelineIdForCompositable();
         AddPipelineIdForCompositable(op.pipelineId(),
                                      op.handle(),
                                      op.isAsync());
         break;
       }
       case WebRenderParentCommand::TOpRemovePipelineIdForCompositable: {
         const OpRemovePipelineIdForCompositable& op = cmd.get_OpRemovePipelineIdForCompositable();
-        RemovePipelineIdForCompositable(op.pipelineId(), txn);
+        RemovePipelineIdForCompositable(op.pipelineId(), aTxn);
         break;
       }
       case WebRenderParentCommand::TOpAddExternalImageIdForCompositable: {
         const OpAddExternalImageIdForCompositable& op = cmd.get_OpAddExternalImageIdForCompositable();
         AddExternalImageIdForCompositable(op.externalImageId(),
                                           op.handle());
         break;
       }
@@ -820,17 +825,16 @@ WebRenderBridgeParent::ProcessWebRenderP
         break;
       }
       default: {
         // other commands are handle on the child
         break;
       }
     }
   }
-  mApi->SendTransaction(txn);
 }
 
 mozilla::ipc::IPCResult
 WebRenderBridgeParent::RecvGetSnapshot(PTextureParent* aTexture)
 {
   if (mDestroyed) {
     return IPC_OK();
   }

--- a/gfx/layers/wr/WebRenderBridgeParent.h
+++ b/gfx/layers/wr/WebRenderBridgeParent.h
@@ -205,17 +205,18 @@ private:
   void RemovePipelineIdForCompositable(const wr::PipelineId& aPipelineId,
                                        wr::TransactionBuilder& aTxn);
 
   void AddExternalImageIdForCompositable(const ExternalImageId& aImageId,
                                          const CompositableHandle& aHandle);
   void RemoveExternalImageId(const ExternalImageId& aImageId);
 
   LayersId GetLayersId() const;
-  void ProcessWebRenderParentCommands(const InfallibleTArray<WebRenderParentCommand>& aCommands);
+  void ProcessWebRenderParentCommands(const InfallibleTArray<WebRenderParentCommand>& aCommands,
+                                      wr::TransactionBuilder& aTxn);
 
   void ClearResources();
   uint64_t GetChildLayerObserverEpoch() const { return mChildLayerObserverEpoch; }
   bool ShouldParentObserveEpoch();
   mozilla::ipc::IPCResult HandleShutdown();
 
   void AdvanceAnimations();
   void SampleAnimations(nsTArray<wr::WrOpacityProperty>& aOpacityArray,