Thanks for getting back to us about this, epukelo. We apologize that we didn't understand what you had enabled and disabled, but we can definitely look into this further with you. As the steps you took should have resolved this behavior, let’s continue by testing to see when this behavior occurs.
First, put your Mac into safe mode and test. Booting into safe mode will disable any startup and login items from automatically opening, which can help us to isolate the source of the issue further. When you do this, you’ll see some unusual behavior from the display; this is to be expected. Please follow the steps in this article: How to use safe mode on your Mac.
Next, let's see if this behavior persists in a second user account on your Mac. Please follow these steps to make a test account that can be deleted later: Set up users, guests, and groups on Mac.
If the behavior is the same in both modes, please let us know. Have a good day.