Big Sur red/green glitches on Apple logo boot screen

Dell XPS 15 9570 | OpenCore 6.6.6 | Big Sur 11.2.1

System works flawlessly.

After updating to Big Sur from Catalina, the Apple logo gets a sudden glitchy red/green square around it.

YouTube link here - occurs at roughly 0:15

Anyone experience this and/or have a fix?

submitted by /u/rapescape
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