This sounds like a script conflict in the cart drawer unlike the full cart page, the drawer loads via AJAX, and some apps or Shopify’s own dynamic checkout scripts may not reinitialize correctly there.
I’d recommend inspecting the blank buttons using DevTools to see if they’re present but styled incorrectly or failing to render. Also try disabling any cart or checkout-related apps one by one to pinpoint the conflict.
In some cases, adding a Shopify PaymentButton call after the drawer loads can help re-render the buttons. Let me know if you want help placing that in your theme.
