I worked with someone who did this. It was the HR person. She just didn’t show up one day, didn’t answer her phone or door. For a solid week. After a wellness check by the police, it was revealed that she was fine, just couldn’t go back in to work because she hated her job so much.
I was young, and it was a shitty grocery chain filled with shitty management and shitty customers. I 100% thought she had killed herself, or skipped town for some other awful reason. It was a relief to hear she was OK. Fuck that store.
I am in a much better environment! This was about 10 years ago, and that particular store closed. I also ghosted that job. They had been harassing my trans coworker friend so we just stopped showing up. They did NOT try to call me :)