And the chilli is still at the chopping onions stage. Now, in my books that means the chilli is still at least a four hour simmer away from “tea” time. At worst an hour away. Not to mention the fact the person making said chilli was nowhere to be seen (heard).
Well, it is conceptually a stew, after all, and (except in fantasy novels) stews take time.
One might have thought that Gurpreet Kaur Bhatti (for it is she) would know this. I dunno what her cultural food background is (she is after all a British Sikh), but for example a curry is also conceptually a stew…
A big problem with slow cookers - best to pre-cook the beans before adding them. Cannellini / butter beans can have the same issue. Normally tinned beans are OK (they’re cooked) but still best to boil them for about ten minutes.