JSON return <1 empty item>

I just noticed that my bot is fetching a JSON entry of “<1 empty item>”, upon investigation, this seems to happen when a card(MTG) is missing a foil price.

Instead of returning null on the foil price value, it returns both <1 empty item> in Normal and Foil.

Any fix for this? I have some error handler for null values and it worked before. Is something wrong with my JSON call? Or this is from TCG API itself?