All. The. Time.
My favorite is when it comes on a brioche bun. Oh, goodie—milk AND eggs. I’m okay with the patties being cooked on the same grill (if I’ve agreed to eat there, I’ve already accepted that’s going to be the case), and I can ask them to leave off the cheese, but I can never trust the bread. Half the bread in the damn grocery store has milk in it—stands to reason the restaurants do too. And then, of course, if you ask about it, you’re lucky if you get someone who understands. Half the time waiters will lie to you—even if they actually check*
*Not a slam on waiters, its a shit job with shit pay, but they’re overworked and underpaid and sometimes they just don’t care.
I just let the hate flow though me, like the force, and trust it will move to all the right targets. There are so many I quit naming/listing them.