Could the origination of the Mandela Effect possibly be the result of confusing a person for a cause? (Sorry for placing the burden on you, but I suspect you already know the topic better than I would in days of research.)
Steve Biko, perhaps? (Certainly more than 20 years, but it’s all I can come up with.)
Thank you. This is a great, wonderfully researched, entertaining and interesting article about humanity (especially in the Age of Drumpf), but I suspect many of us already know enough about Chic*-fil-A to consider avoiding them under any name or spelling.