Worldediting 120000 blocks at once has a good chance to crash your server, which might sometimes remove some progress you made as well.
I just lost another day of progress and there was no world editing of builds larger than 5000-10000 blocks. 2 times in 3 days have I lost A huge amount of progress and no one has a solution for me. I made regular backups since the last incident but when I load them they are always of the old version of the world.