eol-semicolon.sublime-macro

[
  {
    "args":
    {
      "to": "eol"
    },
    "command": "move_to"
  },
  {
    "args":
    {
      "characters": ";"
    },
    "command": "insert"
  }
]

Try this instead:

[
    { "command": "set_mark" },
    { "command": "move_to", "args": {"to": "eol"} },
    { "command": "insert", "args": {"characters": ";"} },
    { "command": "swap_with_mark" },
    { "command": "clear_bookmarks", "args": {"name": "mark"} },
]

This macro retains your current cursor place. I use it to add a comma (,) at the end of like while I am writing code.
I've also added this keymap for quickly adding it to the end of line:

    { "keys": ["ctrl+;"], "command": "run_macro_file", "args": {"file": "Packages/User/Macros/sepicolon_at_eol.sublime-macro"} },

Enjoy!