Server gives warning about chunkloading.

[22:55:29] [Server thread/WARN] [FML]: Astral Sorcery loaded a new chunk (5, 27 Dimension: 0) during chunk population, causing cascading worldgen lag. Please report this to the mod's issue tracker. This log can be disabled in the Forge config.

What version are you on? Might be potentially outdated. If it's not outdated, how often did that appear.

Information never provided. Reopen the issue once you want to add more information..

Outdated version was the culprit, have yet to see the problem occur again, and if so i'll let you know asap.