On the "Print Reports" page when I chose "Word View" there is a problem with custom fields :
print_all_bug_page_word.php needs the variable $t_project_id to get custom fields.
When you have choosen "All Projects" helper_get_current_project returns 0 so the SQL request which needs the Project Id to get the Custom Fields of the current bug cannot find it.

helper_get_current_project shouldn't be used for the print report. Inside the "for" it would be better to get the project id for each bug.

In the same file $project_name = project_get_field( $v_project_id, 'name' ); doesn't return anything because $v_project_id has no value.
And this variable is never used.