Bumping the thread as anet did nothing to fix the bug and yes - this is a bug in their application - nothing to do with our systems or how we connect to the internet. If a client looses the connection with the server, it should simply reconnect - that's how all TCP applications work.
Right now we have to complete "Hidden Arcana" story to get the new achievement. This is one the longest story missions and I already got disconnected twice at the same moment.
Oh, and don't bother contacting support - they will spam you with some stupid, useless tasks like getting hijack logs (srsly who uses this in 2021?) or getting tracert stats.