We've released a beta for the server version 3.1.2 to fix a crash upon receiving malicious packets that is currently being abused.
This server version also improves time handling, reducing the "detected incorrect system clock" log message.

Unless major issues are found, we plan to release this server as stable within the next 48 hours.

Full changelog:
=== Server Release 3.1.2  23 april 2018
 + Better handling of nonlinear system clocks.
 + Fixed crash on malicious incoming traffic.
Beta server is available here.
For Feedback please use the discussion thread