Replication slaves failed on IO without any error

I’ve primary with 10 replicas connected, since yesterday few replicas are not able to catchup with primary. All I can see that IO is not up to date and it’s choked. On primary I can able to see the status *Sending binlog event to slave *. Tried stopping, reseting the replicas, didn’t help. Took restart of the primary and all the replicas, started to get sync from master. What can be the issue?
Checked the network stats. All of them are in same network and there is no packet loss or poor response.
Out of 10, 3 replicas behaved like this while others continue to sync with the master.