diff --git a/renderdoc/core/resource_manager.h b/renderdoc/core/resource_manager.h
index 1e7626800..82a482f05 100644
--- a/renderdoc/core/resource_manager.h
+++ b/renderdoc/core/resource_manager.h
@@ -1392,7 +1392,7 @@ rdcarray<ResourceId> ResourceManager<Configuration>::InitialContentResources()
   {
     ResourceId id = it->first;
 
-    if(HasLiveResource(id))
+    if(IsCaptureMode(m_State) || HasLiveResource(id))
     {
       resources.push_back(id);
     }
@@ -1566,9 +1566,10 @@ void ResourceManager<Configuration>::InsertInitialContentsChunks(WriteSerialiser
 
   End_PrepareInitialBatch();
 
-  for(auto it = m_InitialContents.begin(); it != m_InitialContents.end(); ++it)
+  rdcarray<ResourceId> resources = InitialContentResources();
+  for(auto it = resources.begin(); it != resources.end(); ++it)
   {
-    ResourceId id = it->first;
+    ResourceId id = *it;
 
     RenderDoc::Inst().SetProgress(CaptureProgress::SerialiseInitialStates, idx / num);
     idx += 1.0f;
@@ -1607,32 +1608,34 @@ void ResourceManager<Configuration>::InsertInitialContentsChunks(WriteSerialiser
 
     dirty++;
 
-    if(!Need_InitialStateChunk(id, it->second.data))
+    InitialContentStorage &data = m_InitialContents[id];
+
+    if(!Need_InitialStateChunk(id, data.data))
     {
       // this was handled in ApplyInitialContentsNonChunks(), do nothing as there's no point copying
       // the data again (it's already been serialised).
       continue;
     }
 
-    if(it->second.chunk)
+    if(data.chunk)
     {
-      it->second.chunk->Write(ser);
+      data.chunk->Write(ser);
     }
-    else if(!it->second.filename.empty())
+    else if(!data.filename.empty())
     {
-      FILE *f = FileIO::fopen(it->second.filename, FileIO::ReadBinary);
-      FileIO::fseek64(f, it->second.fileStart, SEEK_SET);
-      StreamReader reader(f, it->second.fileEnd - it->second.fileStart, Ownership::Stream);
+      FILE *f = FileIO::fopen(data.filename, FileIO::ReadBinary);
+      FileIO::fseek64(f, data.fileStart, SEEK_SET);
+      StreamReader reader(f, data.fileEnd - data.fileStart, Ownership::Stream);
 
       StreamTransfer(ser.GetWriter(), &reader, NULL);
     }
     else
     {
-      uint64_t size = GetSize_InitialState(id, it->second.data);
+      uint64_t size = GetSize_InitialState(id, data.data);
 
       SCOPED_SERIALISE_CHUNK(SystemChunk::InitialContents, size);
 
-      Serialise_InitialState(ser, id, record, &it->second.data);
+      Serialise_InitialState(ser, id, record, &data.data);
     }
 
     // Reset back to empty contents, unloading the actual resource.
diff --git a/renderdoc/driver/d3d12/d3d12_manager.cpp b/renderdoc/driver/d3d12/d3d12_manager.cpp
index e698e3804..4cfe95d0c 100644
--- a/renderdoc/driver/d3d12/d3d12_manager.cpp
+++ b/renderdoc/driver/d3d12/d3d12_manager.cpp
@@ -3437,6 +3437,13 @@ rdcarray<ResourceId> D3D12ResourceManager::InitialContentResources()
     if(aData.buildData && bData.buildData)
       return aData.buildData->Type > bData.buildData->Type;
 
+    // serialise ASs first to allow reallocation.
+    // since the enum is serialised we couldn't change the order so we do this by hand
+    int aASSort = aData.resourceType == Resource_AccelerationStructure ? 0 : 1;
+    int bASSort = bData.resourceType == Resource_AccelerationStructure ? 0 : 1;
+    if(aASSort != bASSort)
+      return aASSort < bASSort;
+
     return aData.resourceType < bData.resourceType;
   });
   return resources;
diff --git a/renderdoc/driver/vulkan/vk_manager.cpp b/renderdoc/driver/vulkan/vk_manager.cpp
index 3bb981ffc..4d57e8207 100644
--- a/renderdoc/driver/vulkan/vk_manager.cpp
+++ b/renderdoc/driver/vulkan/vk_manager.cpp
@@ -1054,6 +1054,13 @@ rdcarray<ResourceId> VulkanResourceManager::InitialContentResources()
         return true;
     }
 
+    // serialise ASs first to allow reallocation.
+    // since the enum is serialised we couldn't change the order so we do this by hand
+    int aASSort = aData.type == eResAccelerationStructureKHR ? 0 : 1;
+    int bASSort = bData.type == eResAccelerationStructureKHR ? 0 : 1;
+    if(aASSort != bASSort)
+      return aASSort < bASSort;
+
     return aData.type < bData.type;
   });
   return resources;