Is the author of Microsoft Outlook calendar invitations notified when I invite others from the resulting Google Calendar invite

In my Gmail account, when I receive a Outlook calendar invite (in the form of an .ics file attachment which is using iCalendar format), and then forward that even to a different Gmail account, I do not want the identity of that second Gmail account to be shared with the original author of the Outlook calendar invite. My testing shows that it does indeed work just like that, but I want to know if it is guaranteed to work like that, or whether or not I'm relying upon a bug in Googles handling of this specific type of invite sharing scenario.

Here is my test sequence:

1. Using my Microsoft Outlook account, I created a calendar event inside Microsoft Outlook, and sent it to my personal Gmail account at a@gmail.com.
2. When I received the event in Gmail, I clicked Yes to rsvp from that a@gmail.com account.
3. From my a@gmail.com account, I then clicked on the event inside Google Calendar, and clicked on the pencil icon to edit it.
4. I then added b@gmail.com to the invite list. At this point I noticed the question mark icon and clicked it, and read the verbiage (see screenshot below with the red underlined text), and clicked save.
5. In the b@gmail.com I received the email there and clicked "Yes" in the email.

I then checked my original Outlook Calendar entry, and not once did I see any mention of b@gmail.com

But is it intended to work that way? See screenshot below.