@Maja_Chou thank you for the information! Also thanks to all the other people reporting on this issue.
I’ve been hit by it a few months ago, didn’t get my abyssal ship reimbursed because “server logs show nothing”, and I got so frustrated by it.
I still get random disconnects, at least once a day, sometimes on one of my two clients only, but at least now the client crashes immediately, which I find an improvement over freezing for minutes before closing.
I wish this issue was fixed because it makes many activities so bad, especially fleets and interacting with other players, as you will eventually disconnect.