If the internet connection fails, and you exit the game, you cannot go back in it, ERROR

You'll get a critical ERROR that blocks the whole PC if you log in again after the internet connection failed during a game. Seriously guys, this issue is here since last month, or maybe more, what kind of testers/programmers do you have that cannot observe this thing?

Note that this isn't happening only on my PC. Not even only in my network....this really sucks.