Way to not invite when populating chat room member list?

We’‘re getting lots of requests for perpetual chat rooms from our users, and I’'ve noticed an odd side-effect: when you add someone to the member list of a room (many of our rooms are members-only), it sends them a chat invite. This leads to a bit of confusion as 3 people jump into a room with no actual meeting going on.

I’'m making these rooms to pre-populate them for later use, not immediate needs. Is there any way to disable this auto-invite?