#16 Lag with AdvancedOreGen

I'm using version 1.6.8 for my 1.8.8 server and it really lags the server badly. Also our timings show AdvancedOreGen at the top with some pretty high numbers. People are completely unable to move with this. Any idea what's wrong?

https://timings.aikar.co/?id=2b46b1b9e3894221bad28102274b0a26

CustomOreGen worked just fine.

Thanks, we're already investigating in this issue.

Is this still a thing?