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Space must be full of dead time travelers who didn't figure out that time and spacetime are not equivalent concepts. If you start your time travel at location A, say Orlando, FL and then travel five years back (or forward) in time, you will arrive in the same spot but the Earth won't be in that same spot at that time due to orbits and other planetary motion things. You will likely be in space or worse yet, inside an object that now occupies that spacetime. I think this is why time travel doesn't work out for us.

Back to the Future would have been a rather short movie if it took this detail into account.

Space must be full of dead time travelers who didn't figure out that time and spacetime are not equivalent concepts. If you start your time travel at location A, say Orlando, FL and then travel five years back (or forward) in time, you will arrive in the same spot but the Earth won't be in that same spot at that time due to orbits and other planetary motion things. You will likely be in space or worse yet, inside an object that now occupies that spacetime. I think this is why time travel doesn't work out for us. Back to the Future would have been a rather short movie if it took this detail into account.
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[–] • 1 pt

I assume that since a warp bubble bends the space around it, a time bubble would do the same, essentially letting one pass through matter (or more accurately, passing the matter around the warp bubble), so the smart thing to do would be before collapsing that bubble, having some kind of sensor ensuring that nothing is occupying the same space/time where you phase back into the 3rd dimension reality.