the servers destroyed me

Ok, I start a unic map, paradise something, that is the one that gives experience, level 90, missing 20% ​​to 91, I start with a waystone level XI... complete map, 99%. A few moments later server lag, the server kicks me out and.... surprise surprise.... I'm missing 20% ​​again, the waystone is gone, the map has failed.
Very good, alt+F4
Is there anything you can do in a situation like this?

This has been an issue since the 0.2.1 release. Unfortunately there is nothing we can do as players since the issue is server side.