Whenever Pecon's server tries to load bricks without him having been there (e.g. the automatic process right after a crash), we get:
ERROR: ServerLoadSaveFile_Tick() - $LoadingBricks_BrickGroup does not exist!
0 / 0 bricks created in 0:0-0.1
If I join the server, reload manually (which creates a brick group for him), clear, then reload externally, it works.