I am using LR Classic current version on MacOS Catalina version 10.15.6. While scoring images of a large set after a seemingly random numnber of image scores I lose control and the focus simply races through ALL the remaining images until it hits the end. Nothing seems able to stop it. I am able to close LR (I have not lost all control) but unless it hits the end of the set, I am unable to return to normal scoring. I can't see any indication otherwise of what is happening.