Good afternoon and thank you for posting on the Final Fantasy XIV Technical Support Forums.

I think you know the traditional suggestions we will provide, so let's try something a bit different.

First, how often does this happen? It doesn't sound like it's terribly consistent, but I may be misinterpreting your post.

Do you have the same issue if you try to connect to the EU or JP servers? If you don't have any characters on those servers, do you mind creating one and testing it? Theoretically, you should have less issues with the EU Data Center since you're much closer.

Do you have another PC (or possibly a PS4) that you can try to log in from? Does this give you the same issue? Can you try another type of connection, like using your phone as a hot spot?

Finally, can you post a trace route to the NA Data Center while using the VPN? Preferably, can you run the trace route immediately after being disconnected? This will hopefully give us an accurate representation of what is happening.

We hope we can be of assistance in helping you enjoy the exciting world of Final Fantasy XIV!