The reason why this is happening is due too “packet loss”. Meaning the network wasn’t able to receive a packet. And audio
streams are sensitive to packets loss causing the communication too become incomprehensible
This can happen for a wide variety of reasons, packet reached TTL, packet got dropped due to network issues etc. There also have been cases where packets get dropped by the receiving client, also the cause of the horrible desync we had a couple of versions ago.
As @alberto2345 said, either live with it or use a custom solution.