I have this bug sometimes if i explore and suddenly die due to enemy. If i load the last autosave, everything is fine, but i don't know if it help if you build the HUB above the floor on top of a foundation. I don't know if the z value (height) is just too low so you spawn below the hub and fall thru map or if the location is completly different and you repeatly spawn anywhere below to map to repeatly fall and die. This bug doesn't appear to happen always, it seems its happen only if you are too far from HUB if you die.
You may try to use height foundation and build the HUB on top.