STM32F101 current draw in Stop mode

I discovered ~450uA additional current draw coming from the STM32F101 in Stop mode.  This condition occurs when an external pin interrupt from a peripheral goes active during Stop mode even though the NVIC is disabled for that pin.  The key is that BOTH the NVIC and EXTI must be disabled.  As soon as I disabled the EXTI for that pin as well, the power consumption was much lower as expected.  I don't see this occur on my STM32F103 eval board so it must be something inherent to the STM32F101.