Planet crash is something believed to happen when too many friendly npcs are hostile at once.
(I don't know the exact cause of this. But i believe it is caused by the game trying to process many things at once. Like many guards trying to kill you) It may be also caused by something in the world gen that went wrong. Which can also cause the "Planet didn't load crash" which will instead of beaming you down to the selected planet, it will beam you back to your ship instead for some unknown reason. This guide just tells you that Don't use shardbreaker too much. Because it can break pretty much any block in less than half a second if it isn't shielded.