Were you able to click each link and ensure it takes you to the same meeting? Since this is with Meetings and not Webinar, I've not seen this issue before, so want to ensure you're good. If not, at this point, I'd recommend opening a TAC case to confirm, as it does seem odd to me.
@Christine G How are you scheduling and modifying the meeting - via Web UI or Outlook? Is this for a regular meeting or an event? If the Web UI and Events, are you using modern view or classic view?
@Christine G , the reason I'm asking is because this is a known issue when scheduling a meeting via the Web scheduler using the CLASSIC interface for Events. The attendee links will change, but if you try to access the meeting with the old link or the new link you will land in the same meeting. I've opened a TAC case on this previously because our exec admin team noted and worried about the same thing. However, you should not see this using the modern view scheduler.
