Is it rude to walk into taco bell and order minutes after they open?

I've been going to taco bell fairly often lately. They open at 7 am. I walked in at 7:05 am. I was standing at the counter. I saw a member behind an oven or something look at me, roll her eyes, and walk over and take my order. She was fairly present the rest of the time, but it makes me not want to go back there.