I built a "sky hook" tower from the planet surface into space. I also built a rail-docked sky hook ship.
I removed my faction block from the surface (in order to go and hide it). While I was digging, my astronaut was glitched inside a wall. I could not not move and pressing up did not help, so I logged out and back in again.
When I came back in, my astronaut was deep inside the planet. I digged my way out, and found that the planet facet (hexagon) was rotated approximately 60 degrees from its original facing. The skyhook towers I'd built are now pointing through the planet core and out through an adjacent planet facet.