When opening the program and loading the project, the very first transition to the Lumetri Scopes tab fades and the scopes are not displayed for 10 seconds. After switching navigation, they become operational. The second problem is that when switching from the shot to the next frame for color correction, the Scopes Display Panel does not respond to the clip playing or the Scopes freeze at the time of making a change to the color setting. After a few 5-7 seconds, they die off. And so with each clip on the timeline, Scopes are not responsive and freeze.
Maybe resetting preferences will help: Press Alt (Windows) or Option (Mac OS) while launching Premiere Pro. You can release the Alt key or Option key when the splash screen appears. To reset preferences and plug-in cache at the same time, hold down Shift-Alt (Windows) or Shift-Option (Mac OS) while the application is starting