I am attempting to block a device that I cannot identify but the 'Blacklist' option does not seem to work.  I added the device to the 'Blacklist', clicked 'Save' and rebooted the router but the device still connected.

I tried adding the device to the 'Blacklist' both by;

• manually copying the 'Device Name' and 'MAC Address' from the 'Online Devices' list into the 'Blacklist' and also by
• selecting the device and clicking on the 'Block' option.

Interestingly, the two methods resulted in different names for the device being added but neither worked.    The device shows up as 'TABLET-06O4V8PO' in the 'Online Devices' view, but when it is selected and the 'Block' option clicked, it is added to the Blacklist as 'TABLET-06O4_ACL'.

Another confusing thing is that I can see the device in question when logged in to the router on my pc (in both Basic and Advanced views) but the Tether App does not show it.
UPDATE: further usage suggests that the Tether App is rather unreliable when it comes to reporting all connected devices.  I will ignore this aspect.

I will change the WiFi password, but I do wonder why Blacklist doesn't work.