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Lost of GPIO configuration once the bootloader is started

Question asked by ttl on Jan 27, 2016
Latest reply on Feb 3, 2016 by ttl
I am using the microcontroller STM32L0.
I configured two pins(PB5 and PB6) of the micro as outputs. And the PB5 is  in SET state and the PB6 is in RESET state.
To update the firmware , we use the bootloder. To enter in bootlodaer mode, we make a jump to its address.
But once the bootloader started, I lost the configuration of my two pins, and my RS232 transceiver cannot be ON. Because to activate the transceiver, I must have PB5  SET and PB6 RESET.
Is it normal that the GPIO configuration can be lost in bootloader mode?

Thank you