OBS protocol

[Tru_in_Blu]

Looking for some thoughts on this "almost" situation.

Local slow pitch game played on a field that has a backstop and benches on each side. (No other fencing or dugouts.)

R1 on third; R2 on second; 2 outs.

Batter hits a popup over shortstop that is going to be a tough play. R1, apparently forgetting there are 2 outs, stays on 3rd base as if preparing to tag up. Meanwhile, R2 is running towards third base.

The ball drops in for a base hit and F6 scoops it up on 1 bounce and fires towards home. The throw is off line bringing F2 into the path of R1 who does manage to avoid a collision and step on the plate. OBS is signaled. R2 is about 3 steps behind R1 and scores without incident.

Both runners immediately cross the imaginary DB line between the bench and the backstop pole.

My question is what if R1 had missed the plate? We know that a runner who passes a base is assumed to have touched the base.

Now what happens if the defense appeals that R1 missed the plate?

And that's where I'll turn it over to this forum.