Time travel wouldn't cause stars to warp around or make things appear from nothing.
i realy don't want to start to talk about it.
anyway , i got a good example of the problem with scifi\games .
newtons gravity theory , it was right, it could explain and predict MOST behaviours of reality , but it didn't explain some correctly.
it wasn't wrong, it was simply incomplete .
when the theory was considerate as the most advanced one and rapresentative of reality, it could still not explain the whole reality .
does it means that the reality was wrong or a plothole? no, simply the theory was incomplete , simple and easy to use to understand most thing, but was incomplete.
this happen in world where FTL work without timetraveling effects, the (non)reality showcase this, so the theory of relativity MUST be incomplete .
there is no backward works for theory, they must rappresent reality, is not reality that must rapresent the theory .
so, the whole OP is about negating (non)reality and forcing a theory of our reality in it.