At an old apartment my Chromecast would become unusable whenever I'd use the microwave in the other room. It took me a bit to understand why every now and then

At an old apartment my Chromecast would become unusable whenever I'd use the microwave in the other room. It took me a bit to understand why every now and then it would just take a dump, turns out it was my roommate cooking dinner. Meanwhile my current microwave I can cook and be on bluetooth headphones paired to my laptop across the house and there's no issue. Some microwaves are better shielded than others. It might be leakage from the actual cook box, it might be leakage from all the extra circuitry. Even though the frequency of most microwave's primary element is going to be a little higher than what Bluetooth is supposed to run on, if there's enough energy leaking you'll still potentially drown out the signal. Filters, especially ones made to be kind of cheap, aren't perfect and can't always filter out everything. And as mentioned you're trying to catch a few milliwatt signal right next to something that's trying to generate and contain a 1,000,000 milliwatt signal.