diff --git a/source/adapters/cuda/image.cpp b/source/adapters/cuda/image.cpp
index dc08af248a..8d2610626e 100644
--- a/source/adapters/cuda/image.cpp
+++ b/source/adapters/cuda/image.cpp
@@ -1006,17 +1006,23 @@ UR_APIEXPORT ur_result_t UR_APICALL urBindlessImagesMapExternalArrayExp(
     ArrayDesc.Format = format;
 
     CUDA_EXTERNAL_MEMORY_MIPMAPPED_ARRAY_DESC mipmapDesc = {};
-    mipmapDesc.numLevels = 1;
+    mipmapDesc.numLevels = pImageDesc->numMipLevel;
     mipmapDesc.arrayDesc = ArrayDesc;
 
+    // External memory is mapped to a CUmipmappedArray
+    // If desired, a CUarray is retrieved from the mipmaps 0th level
     CUmipmappedArray memMipMap;
     UR_CHECK_ERROR(cuExternalMemoryGetMappedMipmappedArray(
         &memMipMap, (CUexternalMemory)hInteropMem, &mipmapDesc));
 
-    CUarray memArray;
-    UR_CHECK_ERROR(cuMipmappedArrayGetLevel(&memArray, memMipMap, 0));
+    if (pImageDesc->numMipLevel > 1) {
+      *phImageMem = (ur_exp_image_mem_handle_t)memMipMap;
+    } else {
+      CUarray memArray;
+      UR_CHECK_ERROR(cuMipmappedArrayGetLevel(&memArray, memMipMap, 0));
 
-    *phImageMem = (ur_exp_image_mem_handle_t)memArray;
+      *phImageMem = (ur_exp_image_mem_handle_t)memArray;
+    }
 
   } catch (ur_result_t Err) {
     return Err;
diff --git a/source/adapters/cuda/tracing.cpp b/source/adapters/cuda/tracing.cpp
index e3acf03165..1552e5e236 100644
--- a/source/adapters/cuda/tracing.cpp
+++ b/source/adapters/cuda/tracing.cpp
@@ -27,20 +27,20 @@
 using tracing_event_t = xpti_td *;
 using subscriber_handle_t = CUpti_SubscriberHandle;
 
-using cuptiSubscribe_fn = CUPTIAPI
-CUptiResult (*)(CUpti_SubscriberHandle *subscriber, CUpti_CallbackFunc callback,
-                void *userdata);
+using cuptiSubscribe_fn =
+    CUptiResult(CUPTIAPI *)(CUpti_SubscriberHandle *subscriber,
+                            CUpti_CallbackFunc callback, void *userdata);
 
-using cuptiUnsubscribe_fn = CUPTIAPI
-CUptiResult (*)(CUpti_SubscriberHandle subscriber);
+using cuptiUnsubscribe_fn =
+    CUptiResult(CUPTIAPI *)(CUpti_SubscriberHandle subscriber);
 
-using cuptiEnableDomain_fn = CUPTIAPI
-CUptiResult (*)(uint32_t enable, CUpti_SubscriberHandle subscriber,
-                CUpti_CallbackDomain domain);
+using cuptiEnableDomain_fn =
+    CUptiResult(CUPTIAPI *)(uint32_t enable, CUpti_SubscriberHandle subscriber,
+                            CUpti_CallbackDomain domain);
 
-using cuptiEnableCallback_fn = CUPTIAPI
-CUptiResult (*)(uint32_t enable, CUpti_SubscriberHandle subscriber,
-                CUpti_CallbackDomain domain, CUpti_CallbackId cbid);
+using cuptiEnableCallback_fn =
+    CUptiResult(CUPTIAPI *)(uint32_t enable, CUpti_SubscriberHandle subscriber,
+                            CUpti_CallbackDomain domain, CUpti_CallbackId cbid);
 
 #define LOAD_CUPTI_SYM(p, lib, x)                                              \
   p.x = (cupti##x##_fn)ur_loader::LibLoader::getFunctionPtr(lib.get(),         \
diff --git a/source/adapters/opencl/adapter.cpp b/source/adapters/opencl/adapter.cpp
index 8ae1e77755..4c1bb6bca1 100644
--- a/source/adapters/opencl/adapter.cpp
+++ b/source/adapters/opencl/adapter.cpp
@@ -15,18 +15,36 @@ struct ur_adapter_handle_t_ {
   std::mutex Mutex;
 };
 
-ur_adapter_handle_t_ adapter{};
+static ur_adapter_handle_t_ *adapter = nullptr;
+
+static void globalAdapterShutdown() {
+  if (cl_ext::ExtFuncPtrCache) {
+    delete cl_ext::ExtFuncPtrCache;
+    cl_ext::ExtFuncPtrCache = nullptr;
+  }
+  if (adapter) {
+    delete adapter;
+    adapter = nullptr;
+  }
+}
 
 UR_APIEXPORT ur_result_t UR_APICALL
 urAdapterGet(uint32_t NumEntries, ur_adapter_handle_t *phAdapters,
              uint32_t *pNumAdapters) {
   if (NumEntries > 0 && phAdapters) {
-    std::lock_guard<std::mutex> Lock{adapter.Mutex};
-    if (adapter.RefCount++ == 0) {
-      cl_ext::ExtFuncPtrCache = std::make_unique<cl_ext::ExtFuncPtrCacheT>();
+    // Sometimes urAdaterGet may be called after the library already been torn
+    // down, we also need to create a temporary handle for it.
+    if (!adapter) {
+      adapter = new ur_adapter_handle_t_();
+      atexit(globalAdapterShutdown);
     }
 
-    *phAdapters = &adapter;
+    std::lock_guard<std::mutex> Lock{adapter->Mutex};
+    if (adapter->RefCount++ == 0) {
+      cl_ext::ExtFuncPtrCache = new cl_ext::ExtFuncPtrCacheT();
+    }
+
+    *phAdapters = adapter;
   }
 
   if (pNumAdapters) {
@@ -37,14 +55,20 @@ urAdapterGet(uint32_t NumEntries, ur_adapter_handle_t *phAdapters,
 }
 
 UR_APIEXPORT ur_result_t UR_APICALL urAdapterRetain(ur_adapter_handle_t) {
-  ++adapter.RefCount;
+  ++adapter->RefCount;
   return UR_RESULT_SUCCESS;
 }
 
 UR_APIEXPORT ur_result_t UR_APICALL urAdapterRelease(ur_adapter_handle_t) {
-  std::lock_guard<std::mutex> Lock{adapter.Mutex};
-  if (--adapter.RefCount == 0) {
-    cl_ext::ExtFuncPtrCache.reset();
+  // Check first if the adapter is valid pointer
+  if (adapter) {
+    std::lock_guard<std::mutex> Lock{adapter->Mutex};
+    if (--adapter->RefCount == 0) {
+      if (cl_ext::ExtFuncPtrCache) {
+        delete cl_ext::ExtFuncPtrCache;
+        cl_ext::ExtFuncPtrCache = nullptr;
+      }
+    }
   }
   return UR_RESULT_SUCCESS;
 }
@@ -68,7 +92,7 @@ UR_APIEXPORT ur_result_t UR_APICALL urAdapterGetInfo(ur_adapter_handle_t,
   case UR_ADAPTER_INFO_BACKEND:
     return ReturnValue(UR_ADAPTER_BACKEND_OPENCL);
   case UR_ADAPTER_INFO_REFERENCE_COUNT:
-    return ReturnValue(adapter.RefCount.load());
+    return ReturnValue(adapter->RefCount.load());
   default:
     return UR_RESULT_ERROR_INVALID_ENUMERATION;
   }
diff --git a/source/adapters/opencl/common.hpp b/source/adapters/opencl/common.hpp
index 0667cd3d17..43d1c12b1e 100644
--- a/source/adapters/opencl/common.hpp
+++ b/source/adapters/opencl/common.hpp
@@ -349,7 +349,7 @@ struct ExtFuncPtrCacheT {
 // piTeardown to avoid issues with static destruction order (a user application
 // might have static objects that indirectly access this cache in their
 // destructor).
-inline std::unique_ptr<ExtFuncPtrCacheT> ExtFuncPtrCache;
+inline ExtFuncPtrCacheT *ExtFuncPtrCache;
 
 // USM helper function to get an extension function pointer
 template <typename T>