ace-isearch not working at startup

[WorldsEndless]

I have the following in my Straight config that should start ace-isearch at startup. Indeed, the configuration says global-ace-isearch-mode is on, but it isn't working (in buffers of any type) until I disable and re-enable it. What's wrong?

(use-package ace-isearch
  :delight
  :bind (:map isearch-mode-map 
	      ("M-i" . ace-isearch-swiper-from-isearch))
  :custom
  (ace-isearch-function 'avy-goto-char)
  (ace-isearch-2-switch-function 'avy-goto-char-2)
  (ace-isearch-function-from-isearch 'ace-isearch-swiper-from-isearch)
  (ace-isearch-input-idle-delay 0.2)
  (ace-isearch-input-length 9)
  (ace-isearch-use-ace-jump (quote printing-char))
  (ace-isearch-use-function-from-isearch t)
  (ace-isearch-use-jump (quote printing-char))
  (global-ace-isearch-mode +1))