How is this the only tme this question is asked on the internet and yet Adobe hasn't answered or addressed this anywhere? HOW DO WE FIX THIS?? Premiere is being such a damn headache lately I'm thinking about going back to Final Cut. Why is everything so difficult for no reason ...
You're the third person to post on this. So it's not a 'huge!' or universal issue for the general user base at all. And no one has posted back with further details, updates or anything. So there's no data trail for us peers here to check.
Ann had a very reasonable question ... as this sort of thing is done at times for 'watermarking' trial plugins/effects when using prior to obtaining the license details for the plugin. Do you have a plugin in use here?
Another possibility is some sort of GPU/graphics issue, especially a driver problem.
Other than that, I've not heard nor seen such things. So more details from you would be of immense help to try and sort out why you're getting whatever you're getting.
First ... a screen-grab of your Program monitor screen, drag/dropped onto your text reply box so it appears directly in your reply, would be of use. As would a list of your hardware ... OS/CPU/RAM/GPU/vRAM/GPU driver version.
The media, and what created it ... camera, phone, screen-grab, what?
Then include information for any effects or plugins you may be using where this appears.
That would give us some basis to start troubleshooting this with you.