so we can not use chipmixer now?
If private keys were not destroyed as advertised, there's no reason why sessions were destroyed as advertised either in my opinion.
I'm not programmer but if all keys were derived from the same seed associated with the node, is it simple to delete one private key from the node?
I think there's a chance that private keys were not deleted from the node but all transaction data could have been deleted from local database associated with the website.