Trial1:
1) quit sublime text 3
2) Find "~Sublime Text 3Index" folder and remov files in it
3) reopen the project
If not work, then Trial2:
add "Key Bindings-Users":
[
{ "keys": ["ctrl+shift+r"], "command": "goto_symbol_in_project" }
]
and reboot sublime text 3.(It's means you catch one bug of sumlime text 3. Congratulations!!)