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Flash SR errors on startup

YWor.1
Associate III

Hi all.

I'm working on stm32WB MCU, I have a bootloader and an application. The bootloader only check if any update needed and jump to app. When app stops at main I can see that flash status register is set with PGAERR, SIZERR and PGSERR and I have no idea why it happens. To fix it I added error flags clear on the first flash operation and it works.

I know there are some problems with the second CPU handling ble communication, like the need to clear OPTVERR on startup.

Is there any known problem or am I doind something wrong?

Thanks in advance.

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