Special request from the devs looking into this issue:
Can you please add a comment in this thread when you receive the "Server shutdown" error, with the exact time you received it at (and your time zone)?
Please don't do this for any other type of errors, just for the ones saying "The server is going to be shut down for maintenance purposes. Please try again later."
This would make it easier for the devs as they will be able check our records and get to the bottom of this issue.
Thank you!