Battle.net disconnect after every game

Hey, a friend of mine has the problem that after every game he gets disconnected vom battle.net. So he has to re-login after every game, which is super annoying and prevents him from playing anymore. He doesn’t had this problems some month ago, then suddenly this problem appeared. He hasn’t changed anything in his home setup. Could this be a problem of the battle.net client?

Would appreciate some help. Thanks!

Hey I have the same problem every game in Battlenet I am automatically logged out. I have the same problem also when I play WOW Classic I get there the error “WOW51900319” after a few minutes in the game.

I have had this problem for about a week, maybe a few days longer, but now I can’t play at all without this error.

Device: MacBook Pro (16 inch, 2019)
Operating system: MacOS 11.2.3
Internet Provider: Vodafone, with a FRITZ!Box 6660