Interesting high school play

[SC Ump]

R1, no outs. The offensive team's pitcher is at bat, is hit by a pitch and awarded first.

Batter's ankle is sore and she walks gingerly to first, past first and is about 20 feet "down the line" stretching her ankle that had been hit. Offensive coach sends a runner out to be curteousy runner. She takes her place on the bag.

The umpire makes no acknowledgement of this, but does not comment on it. The original batter runner, then walks slowly back to her dugout on the third base line. When she enters the dugout, the PU rules her out for not touching first. (I was BU and frankly missed it.)

I then instructed R1 that she had to return to first since BR never touching first on the HBP negated her being forced to second.

I do not believe I've ever heard of a similar play.