Note also the Australian accent in the vid you linked.
Every time you hear about this bug it’s in a mixed Oceanic/US group, which is why I believe the issue is ping related.
Edit: The video above if you look closely at chat, DBM is announcing. 1 player is on Nagrand server (Oceanic server in Sydney, Australia), another is on Destromath (US server located in Dallas). Which means that at least someone in that group is playing with 200+ms ping