Chat randomly switches from Everyone to specific DM

[JeffSo]

I partake in a daily zoom meeting with 20-something people.

I've noticed a few times, during a zoom meeting, out of no where, the chat switches from sending to "Everyone" to a specific person in the room. The person chosen for that meeting is random, but once they are chosen, at random intervals during the meeting, even if I change it back to "Everyone" it will eventually get automatically swapped back to DMing that random person. Other people in this same meeting seem to have the same issue as they sometimes randomly DM me as their randomly selected glitched person. What is happening and how do I stop this from happening?