diff --git a/targets/AzureRTOS/ST/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp b/targets/AzureRTOS/ST/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp
index db8d19823b..0cf7fb6ad0 100644
--- a/targets/AzureRTOS/ST/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp
+++ b/targets/AzureRTOS/ST/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp
@@ -580,7 +580,11 @@ HRESULT Library_sys_dev_i2c_native_System_Device_I2c_I2cDevice::
 
             if (status != TX_SUCCESS)
             {
-                NANOCLR_SET_AND_LEAVE(CLR_E_PROCESS_EXCEPTION);
+                // failed to create the thread
+                // free stack memory
+                platform_free(palI2c->WorkingThreadStack);
+
+                NANOCLR_SET_AND_LEAVE(CLR_E_FAIL);
             }
 
             // bump custom state
diff --git a/targets/AzureRTOS/SiliconLabs/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp b/targets/AzureRTOS/SiliconLabs/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp
index 564ce25287..b83732fc89 100644
--- a/targets/AzureRTOS/SiliconLabs/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp
+++ b/targets/AzureRTOS/SiliconLabs/_nanoCLR/System.Device.I2c/sys_dev_i2c_native_System_Device_I2c_I2cDevice.cpp
@@ -583,7 +583,11 @@ HRESULT Library_sys_dev_i2c_native_System_Device_I2c_I2cDevice::
 
             if (status != TX_SUCCESS)
             {
-                NANOCLR_SET_AND_LEAVE(CLR_E_PROCESS_EXCEPTION);
+                // failed to create the thread
+                // free stack memory
+                platform_free(palI2c->WorkingThreadStack);
+
+                NANOCLR_SET_AND_LEAVE(CLR_E_FAIL);
             }
 
             // bump custom state
diff --git a/targets/AzureRTOS/SiliconLabs/_nanoCLR/nanoFramework.Device.OneWire/nf_dev_onewire_nanoFramework_Device_OneWire_OneWireHost.cpp b/targets/AzureRTOS/SiliconLabs/_nanoCLR/nanoFramework.Device.OneWire/nf_dev_onewire_nanoFramework_Device_OneWire_OneWireHost.cpp
index 5f6a5e0a37..fd79ba0737 100644
--- a/targets/AzureRTOS/SiliconLabs/_nanoCLR/nanoFramework.Device.OneWire/nf_dev_onewire_nanoFramework_Device_OneWire_OneWireHost.cpp
+++ b/targets/AzureRTOS/SiliconLabs/_nanoCLR/nanoFramework.Device.OneWire/nf_dev_onewire_nanoFramework_Device_OneWire_OneWireHost.cpp
@@ -471,7 +471,11 @@ HRESULT FindOneDevice(CLR_RT_StackFrame &stack, bool findFirst)
 
         if (status != TX_SUCCESS)
         {
-            NANOCLR_SET_AND_LEAVE(CLR_E_PROCESS_EXCEPTION);
+            // failed to create the thread
+            // free stack memory
+            platform_free(workingThreadStack);
+
+            NANOCLR_SET_AND_LEAVE(CLR_E_FAIL);
         }
 
         // bump custom state