I recently updated my premiere pro to the 2020 update. At the same time I've changed from editing 1080 footage to 4K (So not sure what is at fault). I have a macbook pro 2017 13-inch, so maybe my mac can't handle the 4K, however I have never had this problem before.
It started when I have been exporting footage with lots of effects: Legacy titles, AE composition imports and lumetri colour, every time I export it's exporting with green glitches all over the video. Now, however it exports with glitches even without many effects. Here is what it exports as: