Multicast messages frame counter

I’m using multicast messages and notice a few moments:
when I click “update multicast-group” it resets frame-counter - it can ruin all work with device via multicast messages.

So the questions are:
Can I somehow change current multicast-group frame-counter on server? (when you set fCnt in json in http request - there is no effect)
And in group settings there is a field “Frame-counter” and I didn’t notice that anything change - so what does this parameter affects to?


I think this is related to my question: