Was the LEGO flower petal redesigned?
After a bit of research, it looks like this is a new part for 2018.

The part that it is likely replacing is the old flower petal with stud connections:

Old: New:

The new part has 5 petals instead of 4, and they are shorter so that they don't collide with neighboring parts at any angle. New Elementary did a writeup on the new flower parts that includes an image to highlight this:



Both parts include the interior flower stem connector so that they can be used with either the new or recently redesigned flower stem.