Interesting tidbit: the book series that this website is named for is actually spelled berEnstAin bears, emphasis on the letters that everyone (including myself) remembers being spelled the other way. I literally learned this yesterday
The Wikipedia article on the aforementioned bears even has a section on it —
https://en.wikipedia.org/wiki/Berenstain_Bears#Name_confusio...
^1 - which was the Mandala effect, in my original universe, I’m sure.
Much like how in the Mandela effect the original universe is wiped at least partially away, leaving no trace of what was a complex and fully featured aspect of the timeline, other than what remains in your memory. Other people say "no, that's always been a table" while you remember the sand that was on top of it. Or something along those lines! For some people the resonance is strong enough for the mandala imagery to potentially overwrite the Mandela etymology. Especially if you're a person who's never experienced the effect about Mandela himself.
The books were a very minor part of my childhood, but I noticed immediately, and my family always pronounced it correctly.