Need NFHS Ruling

[CecilOne]

Originally Posted by Andy

Case play 2.49 Sit B is applicable to your play.

*2.49 SITUATION B: The bases are loaded with R1 on third, R2 on second and R3 on first and one out. B5 hits a fly ball into short right field that appears to drop in for a base hit, despite three fielders converging to try to make the catch. R1 crosses home plate and all the other runners hold close to their bases. For some reason, R1 decides to go back to third. None of the umpires signaled an out. The ball actually hit the ground without being caught. The defense throws the ball to the catcher who touches home plate.
What is the ruling?

R1’s advancement to home was legal. R1’s run scores; bases remain loaded with one out. If the umpires deem that R1’s act of retreating after touching home interferes with a defensive player’s opportunity to make a play on another runner, the runner closest to home would be declared out, but R1’s run would still count. (8-6-18)

It also presumes that the other runners advance safely on/after the throw home because the case says "the other runners hold close to their bases". Not automatic.