To reproduce, evaluate this:

(defmacro kek (&rest more-cases)
  `(pcase it
     (`foo 1)
     ,@more-cases))

(defun lol (x)
  (--each x
    (kek))
  (--each x
    (kek (`baz 3))))

Observe that there is "pcase-memoize: equal first branch, yet
different" gibberish in *Messages* buffer.

Attached patch comments out this debug output.