@Kevin_Z Thanks for the reply.  Unfortunately your answer seems to contradict to what the link that you provided states (screenshot below).

And what I've found is clear - since I have more than one profile - sometimes the behavioural state of one filter seems to be opposite to the icon shown.

I suggest the team need to look at this more closely.

Thanks

@Kevin_Z OK, well, sorry but...since about the 1960's, when the magnetic cassette tape was invented, the icon you labelled "A" has meant "PAUSE" and "B" has meant "PLAY". 
For the avoidance of doubt: https://en.m.wikipedia.org/wiki/Media_control_symbols

If what you write here is indeed correct, you might want a word with your developers...

@Kevin_Z  Having re-read your answer 3 more times, perhaps we are not at odds, but your meaning would be clearer if you wrote:

Hello, icon A means "Pause" because "Internet is Playing", once you click it, it will change to icon B, which means "Play" because "Internet is now paused"; in this way, all the devices in this profile will be restriceted from internet access, vice versa. Once it changes from B to A, that means access is enabled again. We need notice the status once you click it, not the current status before you hit it. 

Now, this is exactly what I had understood, and my experience most of the time.

What I am saying and the reason why I started this thread, is that sometimes, the state of the displayed icon becomes out-of-sync with the state of the Internet enablement, and the wrong icon is shown.  I've been able to "fix" it by clicking the icon 2 or 3 times.