We have a few theories that we're putting to the test, but due to the fact that this has only happened once in the entirety of the existence of the server, it's also really hard to reproduce. Apart from figuring out the source, we're also building in a few safeguards, so in the unlikely event that this problem should occur again, the server will at least fix itself and the problems will be limited to the absolute minimum.
Anyone who obtained rare drops during the time of Sunday's server issues can post a refund on the forums. All drop logs were properly saved, so we can verify who obtained which rare items in order to refund them.
I regret to inform that trades and stakes that were rolled back cannot be refunded. Neither can XP gains, but to compensate for the XP loss, we are hosting a double XP weekend from 24 to 27 November.
The double XP weekend starts in:
And ends in: