How can Meeting ID become invalid after joining from same link

Greetings of the day..

I had got a link to join a webinar, i joined in from the link. In mid of the session during lunch break, that i had got disconnected from the webinar. Tried to join from the same link but it shows "INVALID LINK". how is it possible that link becomes invalid even after a certain period of time.

Is it some kind of temporary link that's created that logs you out of the webinar after duration or is it technical glitch.