As per your concern, we would request you to kindly perform the following steps to resolve your issue.
Go to settings>>tap on accessibility>> Tap on advance settings>> tap on flash notifications>> turn on Camera flash or screen flash option.
In case the issue persists, kindly share the report of the problems with a log file. To share a log file, click on the Samsung Members Application (Open Samsung Members Application > Support> Tap on error report > Type your query > Send).
