This set of rules causes all products to be hidden...but why?

rules.cljs

;; Filtering

; product visible when no filter
(define [:app :visible-product/id ?e] :- [:not [_ :product-filter/range]]
                                         [:not [_ :product-filter/category]]
                                         [[?e :product/name]])

; product visible when filter active and price in range
(define [:app :visible-product/id ?e]
  :- [[_ :product-filter/range ?range]]
     [[?e :product/price ?price]]
     [:test (<= (first ?range) ?price (second ?range))])

; product visible when filter active and product category = selected category
(define [:app :visible-product/id ?e]
   :- [[_ :product-filter/category ?selected-category]]
     [[?e :product/category ?category]]
     [:test (= ?category ?selected-category)])

Minor note you should be able to write the third rule as the following instead of using :test:

; product visible when filter active and product category = selected category
(define [:app :visible-product/id ?e]
   :- [[_ :product-filter/category ?selected-category]]
       [[?e :product/category ?selected-category]])

This had nothing to do with the rules. the subscriptions get broken when there is a clojursecript error