It sounds like some potential software running on your system. It's highly unlikely a specific update from Samsung (ofcourse not impossible, but very unlikely), therefore I wouldn't expect an update to address your issue. Try running your phone in safe mode and takibg a screenshot. If it still occurs, this would indicate a potential bug, otherwise it's likely an app, overlay or certain customisation causing the problem.
To enter safe mode access your power menu (hold side power button if you've set it, or swipe down the quick access panel and press the power icon), hold the Power off button (screen button) until Safe mode appears, then select it to reboot your phone into safe mode.