`mouse=a` prevents the ability of copying and pasting out of vim with readable characters.

Change `mouse=a` to `mouse=r` and that should fix your issue with that. 

one thing I am wondering is, are you changing the config file for your vim with the mouse set to mouse=a?

orignal answer ^ 

If `mouse=r` doesn't give you all the copy past options change it to `mouse=v` 

Both `mouse=r` and `mouse=v` have the same functions you are needing, but depending on the vimrc you are using one will work better then the other.