..had the same problems for the xbox one version, but it only happens when trying to switch to a ship landed on the Mun after leaving it to go back to the space center, then the rest of the game gets buggy, only thing to do at that point is quit to the dashboard and hard restart to clear the cache memory, then restart the game save.. best advice is to quick-save before each major maneuver, and have multiple quick saves so you can go back a step..