The kick’s endpoints are not the whole test
The current Law 18 table gives the kicking team the throw after a qualifying indirect kick from its own half into opposition touch inside the 22. How the ball entered the kicking half matters, including the law’s specified intervening tackle, ruck, maul or opponent-touch conditions.
Imagine a kick bouncing into touch just inside the far 22. A replay beginning at the kicker may show the distance perfectly while omitting that the team had just taken the ball backwards into its own half. The earlier passage is part of the assessment.
Keep one more phase in the replay
Mark the halfway line, then trace the ball back through the preceding transfer. If a qualifying event occurred after the ball returned, retain that event too. Do not replace the detailed history with a blanket statement that taking it back always rules the outcome out forever.
This explains why two kicks with the same start and finish locations can lead to different throw-in decisions. The original scenario isolates the missing history; it does not adjudicate a named kick or extend the rule to kick-offs and restart kicks, which have separate treatment. Geometry is necessary here, but chronology supplies another essential part.
Questions answered
Do identical kick endpoints guarantee identical 50:22 outcomes?
No; the earlier ball history can differ.
Should the replay begin only at the kick?
Include the preceding movement into the half.
Sources & further reading
Official references for the subjects discussed. Service terms and device software can change.