Thanks for the great feedback on Update 20. An update 20 Hot Fix is now available which fixes up several reported issues.
- Item chests are now set as avoid tiles instead of unwalkable
- Fixed: Some colonists unable to perform any jobs when loading a saved game created in Update 19
- Fixed (Mac): Main menu buttons not functioning
- Fixed: Colonists not crafting anything if unable to reach required materials for one of the queued craft recipes.
- Fixed: Colonist not constructing if unable to collect all items for first object in construction queue.