Why does this worker in the pizza in the pizza shop who doesn’t serve me always tell me to have a good night?

Every time I pick up a pizza, there’s this one employee there who never waits on me. He is always cleaning. The one who waits on me tells me to have a good night which is completely normal and being friendly. But every time I am leaving with my pizza going about my business, the employee who is sweeping the rugs isn’t even at the door where I am walking out of keeps bothering me and always tells me: “Have a good night.” Sometimes I acknowledge him with telling him that back but other times it gets so annoying that I will ignore him or I will mention that the guy who waited on me already told me to have a good night then at one point I just told him to leave me alone and get back to work. Also, I will tell him that I am not leaving yet so I could trick him to make him stop saying that where it puts awkwardness in him like he wasted his breath.

I mean he doesn’t do that to anyone else leaving but only says that to me like he wants to make conversation and I find it annoying. He’s not even cleaning by the front door where I am walking out of. Even that will be more natural for him to be friendly to say that but If he wants to tell me to have a good day then he should start learning how to use the register to work with customers. However, it’s not his place to go out of his way to wish me a good night. Why does this worker always have the need to talk to me with saying have a good night? I am just thinking why doesn’t he leave me alone so I have peace and quiet.