1 meeting-id joins 2 different rooms for different participants

my co-worker has some recurring meetings that have repeated for months and schedules some new-meetings.

On some percentage of these people have clicked identical links with the same meeting-id and password but have found them selves in 2 seperate rooms...
We have double and tripple-checked and the meeting-links are identical.

Note-taker took one room along with 1 participant and 2 other participants joined a completely different room at the same time using the same meeting ID...

Should this be possible?