There is definitively a memory leak on 1.19. I'm running a 10000, 10000, -10000, -10000 generation and with 4GB RAM on the server it starts lagging on memory problems and ultimately crashes at around 40%... I have to restart the server and continue after that, seems to go ok, but it will be interesting to see if there is any chunk errors from it.

There doesn't seem to be enough information in this issue to "definitely" say that there is a memory leak. Keep in mind that generally, chunky just generates chunks and memory issues or leaks can be caused by a number of other factors. Unless you are absolutely certain and have evidence to back that, it's nothing I can look into further.

I recommend joining the #chunky channel in our Discord server for basic troubleshooting first, and if we can verify this we can re-open the issue.

Keep in mind that I'm about to hop off for tonight so you likely won't see a response till morning sometime.