The problems with disconnects are back after about a week of no-disconnects. Even this afternoon I played for 3.5 hours without any problems. Then After login this evening it started. In about 4 hours, I had 9 disconnects. Here is the reference to the previously reported issue:

https://forum.square-enix.com/ffxiv/...-from-Masamune

This time I also experienced some extreme lag spikes (which I think were just short enough to not be disconnects). Some examples can be seen in the following short stream part of my play-session:

https://www.twitch.tv/videos/645201995

Look at timestamps: 0:15:50(lag), 0:17:10(lag), 0:20:33(disconnect), 0:21:55-0:22:33(lag)

I hope you can agree that a MMO becomes nearly unplayable with problems like this.