sudden disconnect from server

Hi,

While playing Realms for 3 player, connection with server suddenly is lost and reconnect uses the latest backup which can go back as far as 30 minutes. This has happened 3 times in the past few weeks, of which the last 2 were on 2/13 and 2/14. On 2/13 the disconnect happened when placing down a chest. On 2/14 it was when traveling to the nether.