Arduino for STM32

OK, thanks for your answer and a logical solution.

But is it possible the (re)attach only when waking up?
I tested it to reattach now in loop. But then it will attach every loop and not only if it wakes up.
I know that it is possible with ESP32. But I couldn't find a soltion for STM32.

And I have ...

Hi,

I'am using the Lib stm32duino/STM32duino Low Power@^1.2.5 (https://github.com/stm32duino/STM32LowPower)

But if I send the STM32 in sleep-mode with LowPower.deepSleep(5000) for 5 seconds it also wakes up at GPIO Interrupt without attachInterruptWakeup(...)

Is that the correct behavior? And if ...