Why does printing an array with @ using printf in bash only print the first element?

I have an array snapshots=(1 2 3 4) When I run printf "${snapshots[*]}\n" It prints as expected 1 2 3 4 But when I run printf "${snapshots[@]}\n" It just prints 1 without a newline. My understanding is that accessing an array with @ is supposed to expand the array so each element is on a newline but it does not appear to do this with printf while it does do this with echo. Why is this?