Linksys WRT1900ACS Parental Controls won't work !!!

[zillah]

Dear folks

Simple task can't get it work

https://www.askdavetaylor.com/enable-parental-controls-linksys-wi-fi-router/

Tried to block internet access for one my iPhone for testing purpose

Enable Parental Controls (i.e it is ON)

Choose a specific home device that I want to block then choose option : "Always" ,,,,,,,,,,,,my router screenshot same as the link above

Click Apply

But it didn't work !!!!

I have latest firmware and I did restart the router as well

Am I missing something ?

Thanks