Hello @derLalla,Thank you for bringing this issue to our attention.I confirm this is a bug in the COMP HAL driver.I reported it internally to be fixed by our development team.Internal ticket number: 194520 (This is an internal tracking number and is ...

Hello HKowa.1,It looks like the HSI clock is not enabled when the application is waking-up up from stop mode. To confirm, you can either enable the HSI clock in your HAL_ADC_MspInit function (using __HAL_RCC_HSI_ENABLE()) or you can try to use anothe...