Unfortunately, the link you posted shows two contradictory statements about blocking traffic to a 1:1 NAT. If it's definitely true that it does NOT block inbound to a 1:1 NAT, then they really need to change the wording when enabling it. It just uses 'To/From' there's no disclaimer. Also, that thread is also 5 years old. I may open up a ticket to get clarification. Will post the response here if I do.
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