My female acts roughly the same as yours.
When she was young, she ate everything moving.
Now, she only catches things that are moving fast as roaches, crickets, locusts...And doesn't accept nightcrawlers anymore (Since 2 months) when they are on substrate. She only catches when they are in the water bowl, because in this case, they move a lot in water.

I think those frogs can change their feeding habits with time....