Make the new variable buffer-local.

org.el

@@ -15262,6 +15262,7 @@ will only contain one set of parameters.  When the highlights are
 removed (for example with `C-c C-c', or with the next edit (depending
 on `org-remove-highlights-with-change'), this variable is emptied
 as well.")
+(make-variable-buffer-local 'org-occur-parameters)
 
 (defun org-occur (regexp &optional keep-previous callback)
   "Make a compact tree which shows all matches of REGEXP.