We're experiencing the same issue that never occurred with v16. A collegue reported this concerning an interview and the participants seemingly talk over each other for many seconds or even minutes audibly and visually. This was definitely not the case in realtime - withnessed by dozens of viewers. According to the report there were 89 participants in the meeting. Only two of them had mic and cam enabled. Selected region is Europe.
PBX version: 18.0 (Build 314)