When you spend eight hours coding on your work computer, you make lots of little tweaks to improve workflow. If you then do nearly no coding on your home computer, it's unlikely that you will perform the same tweaks. I try to keep my systems set up almost identically, but that's a lot of work. (I now try to use ansible for that but after playing around for a bit I'm having doubts if it was the right choice. Keeping everything in sync is not exactly ergonomic.)

Some particular quirk of autocompletion could become almost pure muscle memory, and if it's suddenly missing, you notice.