Then you're one of the good ones. Thank you for your excellent service.
I've had servers pretending I was a blind spot in their field of view, their gaze constantly slipping off me like I was the visual equivalent of teflon.
It took me a long time coming to bars to understand the trick of eye contact with the bartender to ask for a check/etc. It can initially be a challenge if you’re not great with eye contact, but a good exercise to do more of it.