When can you split in blackjack after the dealer exposes the next card by mistake?

Rules
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1

Random rules question.

Let’s say you’re dealt a pair and haven’t acted yet. Before you can make a decision, the dealer accidentally exposes the next card that was supposed to stay in the shoe.

Would you still be allowed to split, or would the hand have to be restarted because you’ve now seen information you weren’t supposed to?

I figured the blackjack split rules would cover something like this, but everything I found assumes the dealer never makes mistakes.

Has anyone actually seen a casino handle this in real life?

2

Floor call. Exposed card gets taken out of play, new card comes out, everyone waits around. I’ve seen it twice and both times the procedure was different.

3

This actually made me search when to split cards blackjack, but every result just explains normal split decisions. Nothing about a dealer flashing the next card by mistake.

4

I’d rather lose a hand than have a dealer pretend nobody saw that card. Once the whole table has seen it, you can’t really unsee it. That’s the awkward part.