I've never heard of this happening, but heat doesn't kill toxins that grow on rice from leaving it sit out of the fridge for too long.
https://www.bhg.com/recipes/how-to/food-storage-safety/leftover-rice-food-poisoning/
Better Homes & GardensYou Can Get Food Poisoning from Leftover Rice—Here’s How to Avoid ItLearn how to cook, cool, and store your rice properly so that you don’t get rice food poisoning. Find out how this bacteria gets into your food and how to keep your leftovers safe from contamination.
@Java l
Never had a problem with rice. I've left it out for hours a few times when I forgot about it