I know . . . which is one of the issues that I have with my own views.
If you see below:
The presence of mass creates a depression in space-time, with the “depth” (although I am using a flawed anology) dependant upon how much mass is causing the depression.
If you see below, there is a comparison between a saddle-shaped Universe, a flat Universe, and a hyperspherical Universe:
I believe that a large, extremely dense mass would distort space-time differently near the “edge” (again, a flawed anology) of the saddle-shaped Universe than it would in a “flatter” part of the Universe, as the distortion caused by the dense mass would have a different “shape.”
None of my points apply to a “flat” or “hyperspherical” Universe, because the shape of the Universe is (and this is not a play on words) uniform.
These ideas are not anything more than abstract philosophy and speculation unless they can be falsified.
So, I suggest that a very dense mass would bend light differently in one part of the Universe than it would in another part.
Also, I would expect these differences to be more profound in the cosmic past, because the Universe was smaller . . . and the saddle shape was smaller, so it would be “easier” (as if measuring a light beam in the early Universe is, somehow, easy) to measure these differences with a very large telescope looking into the very early past.
In other words, if there is an asymmetry in the shape of the Universe, then I would expect this asymmetry to be reflected in the gravity of very dense objects.