Please post this on the Resolve forum (viewforum.php?f=21) or the beta forum (viewforum.php?f=32) if you're using the 16.1 beta version.
Please also provide more information on your system - see viewtopic.php?f=21&t=90190 - and whether you're using Davinci resolve studio, non-studio, and other relevant information like whether you're using dual screen layouts, GPU accelerated scopes, which page you're on, etc.