I have an isuue with .mogrt file. I created it in After Effects, exported and add to Premiere pro. Do a test render and you could find what I mean by saying glitches in the attached file called "Counter PPro". After I saw glitches, I decided to export composition from AE, and you see attached file called "Counter AE". All works fine in AE. But Premiere pro did a template little less size than in AE and give me glitches like you can see. Both files exported with same settings (h.265 4K UHD standard preset), from AE exported through Media Encoder.
I work on M1 MacBook Air and never faced something like that.
Sorry for this problem. We have done some export improvements in the latest beta builds. We expect exports to come out without glitches now. You can download the latest Premiere Pro Beta build from Creative Cloud --> Beta apps --> Premiere Pro (Beta)
Please try and let us know how it goes in the beta build. If you still see this issue in beta builds, please share your original footage & export settings. We will check it at our end and take quick action.