My buddies and I use Discord as an easy conference call group chat while playing games (no push to talk, mic is always on).
One thing I've found on the app is when a person/voice is far away from the mic it often glitches and doesn't send all of the audio data over like, for a example, a normal FaceTime Audio call would.
Not sure why this happens, but just thought I'd put that out in the ether.