Well early in the week at the start of the season things where better, but come the weekend when more people are playing I keep getting Disconnection and Game has lost connection followed by the game ahs not saved.
I know this is a Blizzard side problem as I also had a problem getting on the forums to report this.
It happens most seasons when there is a high number of people playing, I mostly play solo as when ever I am in group events they lag and disconnect me often.
I have followed the help centre staff instructions time and again only to have the same thing at season starts and when there is high demand, this is when I am the most keen to play as everyone else is, I don’t have problems with other services so it has to be a Blizzard side issue.
EDIT.
And as expected I join a World Boss fight only to disconnect when the fight starts.