When I was in a queue, trying to join a server I got disconnected from Minecraft: I was able to see an error respond from the server (while I was re-joining to keep my position in the queue) like "Invalid login information" (I don't remember the exact message), so the only thing I could do was to click on the button "return to server list" instead of seeing my server list I was forced to re-do my login to Minecraft like it was the first time I was opening the Launcher (required e-mail & password information).
Consequences: lost my queue position
MCL-4814
Disconnected from Minecraft Server
Resolved
Incomplete
0
After having this issue:
Please attach the complete output of the "Game Output (Your Minecraft name) " which can be found on the fourth tab of the launcher to this ticket.
If the launcher closes after game start, please edit your profile and select "Launcher visibility" then, "Keep the launcher open".