Meetup join late broke

This seems to be more frequent than before. Is this an admitted Zwift defect?

My PM 20 mile ride meetup , three times a week. Tonight 2 tried to join late. One was dropped 5min back and just drove hard and caught us. The other tried 5 times and the software refused to put her with the advancing blob as normal. She finally gave up. Banded meetup.
Again, is this defect something Zwift acknowledges??