Samsung have confirmed that the latest update has removed the ability to manage devices permitted to your mobile hotspot. Now no option to remove devices that had previously been granted access at an earlier time. Really concerning and frustrating that we no longer have control over the devices able to link into our data!
Fair enough. I mostly only use hotspot when I need to connect my laptop to the Internet. If I'm out of the house of course. I have on occasion let some friends use it but I've just changed the password afterwards.