Hotspot allowed devices
Testing the WiFi hotspot with my MacBook Pro the connection was instant. Everything worked flawlessly.
Selecting the option "Allowed devices only" it was not possible to add new device. Tapping on the option "Add devices to this list" nothing happens. That is the case with both my MacBook connected and disconnected as well. If connected selecting the "Allowed devices only" option the MacBook disconnects immediately.
The option to add devices is in white colour and thus available. But it doesn't react on tapping.
Bluetooth tethering also works flawlessly.