I actually sent a payment via Zelle yesterday and saw something new. This was a small payment to a family member that I send payments to regularly for some work

I actually sent a payment via Zelle yesterday and saw something new. This was a small payment to a family member that I send payments to regularly for some work they're doing for me. When I was choosing the recipient, it said something like "Money transfers that happen in seconds," implying they'd have the money almost instantly (and that does appear to have been the case in the past). After completing the transfer, it had a note below the resulting screen that said, "This transfer will take 1-3 days to complete." It did complete the next day, but it was the first time I've seen this sort of thing happen. I wonder if it was due to some new security check or something else? Anyone else see anything like this?