It is not about checkpointing. When a task is paused, I so far assumed it is just halted and kept in memory. The experience I described above, however, suggests that Minecraft discards the entire data after a certain period of time? Which I found baffling. ;-)

Michael.

Please remove the useless once a minute scheduler call from your settings.

If there is a real need for the client to call home make the interval at most once per hour.

Removed, this was dangling from testing, apologies