This is a bug / query.
Is star abandonment instantly visible to all players? I have a situation in a turn based game where a star is showing as abandoned. I think it very likely it was abandoned this turn, however it should not be showing me the star state.
If it is instantly visible then this is surely a bug? Warp-gates ~recently worked this way were changed because it gave an unfair advantage to the last player to commit - it being standard practice for everyone to wait until the last minute.