WWDG bug in STM8S103F3?

[AToth]

Hello,

On STM8S103F3 MCU I, might have found a bug in the WWDT.

Found nothing related in errata. My environment: IAR, HSI 16Mhz

Problem: kicking WWDG too early doesn't trigger instant reset.

void main(void)
{
   WWDG->CR = WWDG_CR_WDGA | 0x7F;
   WWDG->WR = 0x50;
 
   while(1)
   {
     // kicking WWDG too early doesn't trigger instant reset, only if I execute this line ~25times
     // which is useless in real life
     WWDG->CR = WWDG_CR_WDGA | (0x50+1);
   }
}