I have tested GPIO1, GPIO5. It is available to wakeup from lowpower idle.
If I trigger GPIO3 under lowpower idle, it won't go ahead. There is no log any more. Even though I try GPIO1 and GPIO5 after GPIO3, it still no log. It just like in a while(1) or dead cycle of interrupt.
Is there any further more config in GPC, CCM, PGC, etc.