app/controllers/avatars_controller.rb

@@ -14,6 +14,9 @@ class AvatarsController < ApplicationController
       blob = if size == :original
                user.avatar.blob
              else
+               # TODO Variants use the same custom storage key/path, which
+               # makes blob downloads always fetch the original version instead
+               # of the variant. Needs to be fixed/added in Rails.
                user.avatar_variant(size: size)&.blob
              end