The bug reported at
https://lists.gnu.org/archive/html/bug-gnu-emacs/2012-10/msg00581.html
is still a problem in emacs version 24.5.1.  My work-around is to add the
line

(add-hook 'tags-table-mode-hook (function (lambda () (setq
global-auto-revert-ignore-buffer t))))

to my .emacs file.  I suggest instead adding the "setq" above to the
function tags-table-mode.