[IMP] doc: mixing attrs and states is iffy

doc/reference/views.rst

@@ -234,6 +234,11 @@ Possible children elements of the list view are:
 
         Makes the button ``invisible`` if the record is *not* in one of the
         listed states
+
+        .. danger::
+
+            Using ``states`` in combination with ``attrs`` may lead to
+            unexpected results as domains are combined with a logical AND.
     ``context``
         merged into the view's context when performing the button's Odoo call
     ``confirm``