My cat loves ice cubes?

So, I moved out a month ago, and went to visit my parents for a few reasons. We (well, I guess just “they” now) have a cat. Just for the record, she’s about 11 years old, and has been diagnosed with Feline diabetes in the past year. It gets quite hot out where they live (It was in the early 100s today), but they’ve had it nice and cool inside with the AC, so it’s not like she’s necessarily burning up

Anyway, when I was there, they told me that she has become obsessed with ice cubes in her water bowl. Whenever they open the freezer (if she’s nearby), she’ll go running up to it. As soon as they pull some ice cubes out, she’ll sit down like she’s begging, meowing, and following them wherever they go with the cubes. Of course they put some in the bowl and she just drinks up a whole bunch of water.
She’ll do this obsessive “I wanna look at the ice cubes coming out of the freezer” action even if she already has some in her bowl.

Certainly most cats have some strange obsession, but this isn’t one I’ve ever heard about. Anyone familiar with this?