I agree. The umpire should have loudly declared DEAD BALL the moment R1 was tagged out. All further play beyond that is irrelevant.
I also agree that the most likely base for R1 to be awarded would be 3rd, although it is a judgment by the umpire as to which base the runner would have achieved had there been no obstruction, it's have to be a bit unusual for that to be home in this situation.
ASA and Fed are the same here.
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Tom
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