2 points
There’s literally nothing in the universe that is ‘stationary’ so the entire concept is flawed.
2 points
I mean, portals are flawed.
Anything moving through a protal experiences acceleration, unless the exit-portal is at the instantaneously-exact position of the entrance portal.
There has to be rules and limits that are ignored if portals are to exist, which is what the hypothetical situation is presentin5